diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index f4210ed..8293b9e 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -3,6 +3,7 @@ on:
   push:
     branches:
       - 'main'
+  workflow_dispatch:
 jobs:
   build-and-deploy:
     if: github.repository != 'profectus-engine/Profectus' # Don't build placeholder mod on main repo
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c6b970d..de6f71a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,4 +1,4 @@
-name: Build and Deploy
+name: Run Tests
 on:
   push:
     branches: [ main ]
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 41df500..78e51ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,42 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.6.1] - 2023-05-17
+### Added
+- Error boundaries around each layer, and errors now display on the page when in development
+- Utility for creating requirement based on whether a conversion has met a requirement
+### Changed 
+- **BREAKING** Formulas/requirements refactor
+    - spendResources renamed to cumulativeCost
+    - summedPurchases renamed to directSum
+    - calculateMaxAffordable now takes optional 'maxBulkAmount' parameter
+    - cost requirements now pass cumulativeCost, maxBulkAmount, and directSum to calculateMaxAffordable
+    - Non-integrable and non-invertible formulas will now work in more situations
+    - Repeatable.maximize is removed
+    - Challenge.maximize is removed
+- Formulas have better typing information now
+- Integrate functions now log errors if the variable input is not integrable
+- Cyclical proxies now throw errors
+- createFormulaPreview is now a JSX function
+- Tree nodes are not automatically capitalized anymore
+- upgrade.canPurchase now returns false if the upgrade is already bought
+- TPS display is simplified and more performant now
+### Fixed
+- Actions could not be constructed
+- Progress bar on actions was misaligned
+- Many different issues the Board features (and many changes/improvements)
+- Calculating max affordable could sometimes infinite loop
+- Non-integrable formulas could cause errors in cost requirements
+- estimateTime would not show "never" when production is 0
+- isInvertible and isIntegrable now properly handle nested formulas
+- Repeatables' amount display would show the literal text "joinJSX"
+- Repeatables would not buy max properly
+- Reset buttons were showing wrong "currentAt" vs "nextAt"
+- Step-wise formulas not updating their value correctly
+- Bonus amount decorator now checks for `amount` property in the post construct callback
+### Documentation
+- Various typos fixed and a few sections made more thorough
+
 ## [0.6.0] - 2023-04-20
 ### Added
 - **BREAKING** New requirements system
diff --git a/README.md b/README.md
index e535eb2..5f8c741 100644
--- a/README.md
+++ b/README.md
@@ -26,11 +26,6 @@ npm run build
 npm run preview
 ```
 
-### Lints and fixes files
-```
-npm run lint
-```
-
 ### Runs the tests using vite-jest
 ```
 npm run test
diff --git a/package-lock.json b/package-lock.json
index 3e7acae..f747006 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "profectus",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "profectus",
-      "version": "0.6.0",
+      "version": "0.6.1",
       "dependencies": {
         "@fontsource/material-icons": "^4.5.4",
         "@fontsource/roboto-mono": "^4.5.8",
diff --git a/package.json b/package.json
index 4aa9568..3c1c415 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "profectus",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "private": true,
   "scripts": {
     "start": "vite",
diff --git a/src/App.vue b/src/App.vue
index 9613f04..6a365ef 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,18 +1,25 @@
 <template>
-    <div id="modal-root" :style="theme" />
-    <div class="app" :style="theme" :class="{ useHeader }">
-        <Nav v-if="useHeader" />
-        <Game />
-        <TPS v-if="unref(showTPS)" />
-        <GameOverScreen />
-        <NaNScreen />
-        <component :is="gameComponent" />
-    </div>
+    <div v-if="appErrors.length > 0" class="error-container" :style="theme"><Error :errors="appErrors" /></div>
+    <template v-else>
+        <div id="modal-root" :style="theme" />
+        <div class="app" :style="theme" :class="{ useHeader }">
+            <Nav v-if="useHeader" />
+            <Game />
+            <TPS v-if="unref(showTPS)" />
+            <GameOverScreen />
+            <NaNScreen />
+            <component :is="gameComponent" />
+        </div>
+    </template>
 </template>
 
 <script setup lang="tsx">
+import "@fontsource/roboto-mono";
+import Error from "components/Error.vue";
 import { jsx } from "features/feature";
+import state from "game/state";
 import { coerceComponent, render } from "util/vue";
+import { CSSProperties, watch } from "vue";
 import { computed, toRef, unref } from "vue";
 import Game from "./components/Game.vue";
 import GameOverScreen from "./components/GameOverScreen.vue";
@@ -23,12 +30,11 @@ import projInfo from "./data/projInfo.json";
 import themes from "./data/themes";
 import settings, { gameComponents } from "./game/settings";
 import "./main.css";
-import "@fontsource/roboto-mono";
-import type { CSSProperties } from "vue";
 
 const useHeader = projInfo.useHeader;
 const theme = computed(() => themes[settings.theme].variables as CSSProperties);
 const showTPS = toRef(settings, "showTPS");
+const appErrors = toRef(state, "errors");
 
 const gameComponent = computed(() => {
     return coerceComponent(jsx(() => (<>{gameComponents.map(render)}</>)));
@@ -51,4 +57,15 @@ const gameComponent = computed(() => {
     height: 100%;
     color: var(--foreground);
 }
+
+.error-container {
+    background: var(--background);
+    overflow: auto;
+    width: 100%;
+    height: 100%;
+}
+
+.error-container > .error {
+    position: static;
+}
 </style>
diff --git a/src/components/Error.vue b/src/components/Error.vue
new file mode 100644
index 0000000..16c9b6b
--- /dev/null
+++ b/src/components/Error.vue
@@ -0,0 +1,135 @@
+<template>
+    <div class="error">
+        <h1 class="error-title">{{ firstError.name }}: {{ firstError.message }}</h1>
+        <div class="error-details" style="margin-top: -10px">
+            <div v-if="firstError.cause">
+                <div v-for="row in causes[0]" :key="row">{{ row }}</div>
+            </div>
+            <div v-if="firstError.stack" :style="firstError.cause ? 'margin-top: 10px' : ''">
+                <div v-for="row in stacks[0]" :key="row">{{ row }}</div>
+            </div>
+        </div>
+        <div class="instructions">
+            Check the console for more details, and consider sharing it with the developers on
+            <a :href="projInfo.discordLink || 'https://discord.gg/yJ4fjnjU54'" class="discord-link"
+                >discord</a
+            >!
+            <FeedbackButton @click="exportSave" class="button" style="display: inline-flex"
+                ><span class="material-icons" style="font-size: 16px">content_paste</span
+                ><span style="margin-left: 8px; font-size: medium">Copy Save</span></FeedbackButton
+            ><br />
+            <div v-if="errors.length > 1" style="margin-top: 20px"><h3>Other errors</h3></div>
+            <div v-for="(error, i) in errors.slice(1)" :key="i" style="margin-top: 20px">
+                <details class="error-details">
+                    <summary>{{ error.name }}: {{ error.message }}</summary>
+                    <div v-if="error.cause" style="margin-top: 10px">
+                        <div v-for="row in causes[i + 1]" :key="row">{{ row }}</div>
+                    </div>
+                    <div v-if="error.stack" style="margin-top: 10px">
+                        <div v-for="row in stacks[i + 1]" :key="row">{{ row }}</div>
+                    </div>
+                </details>
+            </div>
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+import projInfo from "data/projInfo.json";
+import player, { stringifySave } from "game/player";
+import LZString from "lz-string";
+import { computed, onMounted } from "vue";
+import FeedbackButton from "./fields/FeedbackButton.vue";
+
+const props = defineProps<{
+    errors: Error[];
+}>();
+
+const firstError = computed(() => props.errors[0]);
+const stacks = computed(() =>
+    props.errors.map(error => (error.stack == null ? [] : error.stack.split("\n")))
+);
+const causes = computed(() =>
+    props.errors.map(error =>
+        error.cause == null
+            ? []
+            : (typeof error.cause === "string" ? error.cause : JSON.stringify(error.cause)).split(
+                  "\n"
+              )
+    )
+);
+
+function exportSave() {
+    let saveToExport = stringifySave(player);
+    switch (projInfo.exportEncoding) {
+        default:
+            console.warn(`Unknown save encoding: ${projInfo.exportEncoding}. Defaulting to lz`);
+        case "lz":
+            saveToExport = LZString.compressToUTF16(saveToExport);
+            break;
+        case "base64":
+            saveToExport = btoa(unescape(encodeURIComponent(saveToExport)));
+            break;
+        case "plain":
+            break;
+    }
+    console.log(saveToExport);
+
+    // Put on clipboard. Using the clipboard API asks for permissions and stuff
+    const el = document.createElement("textarea");
+    el.value = saveToExport;
+    document.body.appendChild(el);
+    el.select();
+    el.setSelectionRange(0, 99999);
+    document.execCommand("copy");
+    document.body.removeChild(el);
+}
+
+onMounted(() => {
+    player.autosave = false;
+    player.devSpeed = 0;
+});
+</script>
+
+<style scoped>
+.error {
+    border: solid 10px var(--danger);
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    text-align: left;
+    min-height: calc(100% - 20px);
+    text-align: left;
+    color: var(--foreground);
+}
+
+.error-title {
+    background: var(--danger);
+    color: var(--feature-foreground);
+    display: block;
+    margin: -10px 0 10px 0;
+    position: sticky;
+    top: 0;
+}
+
+.error-details {
+    white-space: nowrap;
+    overflow: auto;
+    padding: 10px;
+    background-color: var(--raised-background);
+}
+
+.instructions {
+    padding: 10px;
+}
+
+.discord-link {
+    display: inline;
+}
+
+summary {
+    cursor: pointer;
+    user-select: none;
+}
+</style>
diff --git a/src/components/Info.vue b/src/components/Info.vue
index 9dd0c2d..15395bf 100644
--- a/src/components/Info.vue
+++ b/src/components/Info.vue
@@ -38,7 +38,7 @@
                         target="_blank"
                     >
                         <span class="material-icons info-modal-discord">discord</span>
-                        The Paper Pilot Community
+                        Profectus & Friends
                     </a>
                 </div>
                 <div>
diff --git a/src/components/Layer.vue b/src/components/Layer.vue
index c00cf8a..1857535 100644
--- a/src/components/Layer.vue
+++ b/src/components/Layer.vue
@@ -1,5 +1,6 @@
 <template>
-    <div class="layer-container" :style="{ '--layer-color': unref(color) }">
+    <ErrorVue v-if="errors.length > 0" :errors="errors" />
+    <div class="layer-container" :style="{ '--layer-color': unref(color) }" v-bind="$attrs" v-else>
         <button v-if="showGoBack" class="goBack" @click="goBack">❌</button>
 
         <button
@@ -28,12 +29,12 @@ import type { CoercableComponent } from "features/feature";
 import type { FeatureNode } from "game/layers";
 import player from "game/player";
 import { computeComponent, computeOptionalComponent, processedPropType, unwrapRef } from "util/vue";
-import type { PropType, Ref } from "vue";
-import { computed, defineComponent, toRefs, unref } from "vue";
+import { PropType, Ref, computed, defineComponent, onErrorCaptured, ref, toRefs, unref } from "vue";
 import Context from "./Context.vue";
+import ErrorVue from "./Error.vue";
 
 export default defineComponent({
-    components: { Context },
+    components: { Context, ErrorVue },
     props: {
         index: {
             type: Number,
@@ -77,13 +78,23 @@ export default defineComponent({
             props.nodes.value = nodes;
         }
 
+        const errors = ref<Error[]>([]);
+        onErrorCaptured((err, instance, info) => {
+            console.warn(`Error caught in "${props.name}" layer`, err, instance, info);
+            errors.value.push(
+                err instanceof Error ? (err as Error) : new Error(JSON.stringify(err))
+            );
+            return false;
+        });
+
         return {
             component,
             minimizedComponent,
             showGoBack,
             updateNodes,
             unref,
-            goBack
+            goBack,
+            errors
         };
     }
 });
diff --git a/src/components/NaNScreen.vue b/src/components/NaNScreen.vue
index de69d5b..f9c7b6f 100644
--- a/src/components/NaNScreen.vue
+++ b/src/components/NaNScreen.vue
@@ -19,7 +19,7 @@
                     class="nan-modal-discord-link"
                 >
                     <span class="material-icons nan-modal-discord">discord</span>
-                    {{ discordName || "The Paper Pilot Community" }}
+                    {{ discordName || "Profectus & Friends" }}
                 </a>
             </div>
             <br />
diff --git a/src/components/Nav.vue b/src/components/Nav.vue
index a71f15d..c5d0026 100644
--- a/src/components/Nav.vue
+++ b/src/components/Nav.vue
@@ -15,9 +15,7 @@
                     <a :href="discordLink" target="_blank">{{ discordName }}</a>
                 </li>
                 <li>
-                    <a href="https://discord.gg/yJ4fjnjU54" target="_blank"
-                        >The Paper Pilot Community</a
-                    >
+                    <a href="https://discord.gg/yJ4fjnjU54" target="_blank">Profectus & Friends</a>
                 </li>
                 <li>
                     <a href="https://discord.gg/F3xveHV" target="_blank">The Modding Tree</a>
@@ -82,9 +80,7 @@
                     <a :href="discordLink" target="_blank">{{ discordName }}</a>
                 </li>
                 <li>
-                    <a href="https://discord.gg/yJ4fjnjU54" target="_blank"
-                        >The Paper Pilot Community</a
-                    >
+                    <a href="https://discord.gg/yJ4fjnjU54" target="_blank">Profectus & Friends</a>
                 </li>
                 <li>
                     <a href="https://discord.gg/F3xveHV" target="_blank">The Modding Tree</a>
diff --git a/src/components/TPS.vue b/src/components/TPS.vue
index a460a09..db73da6 100644
--- a/src/components/TPS.vue
+++ b/src/components/TPS.vue
@@ -1,17 +1,11 @@
 <template>
-    <div class="tpsDisplay" v-if="!tps.isNan()">
-        TPS: {{ formatWhole(tps) }}
-        <transition name="fade"
-            ><span v-if="showLow" class="low">{{ formatWhole(low) }}</span></transition
-        >
-    </div>
+    <div class="tpsDisplay" v-if="!tps.isNan()">TPS: {{ formatWhole(tps) }}</div>
 </template>
 
 <script setup lang="ts">
 import state from "game/state";
-import type { DecimalSource } from "util/bignum";
 import Decimal, { formatWhole } from "util/bignum";
-import { computed, ref, watchEffect } from "vue";
+import { computed } from "vue";
 
 const tps = computed(() =>
     Decimal.div(
@@ -19,20 +13,6 @@ const tps = computed(() =>
         state.lastTenTicks.reduce((acc, curr) => acc + curr, 0)
     )
 );
-
-const lastTenFPS = ref<number[]>([]);
-watchEffect(() => {
-    lastTenFPS.value.push(Math.round(tps.value.toNumber()));
-    if (lastTenFPS.value.length > 10) {
-        lastTenFPS.value = lastTenFPS.value.slice(1);
-    }
-});
-
-const low = computed(() =>
-    lastTenFPS.value.reduce<DecimalSource>((acc, curr) => Decimal.max(acc, curr), 0)
-);
-
-const showLow = computed(() => Decimal.sub(tps.value, low.value).gt(1));
 </script>
 
 <style scoped>
diff --git a/src/data/common.tsx b/src/data/common.tsx
index 1fdfd61..c81fa0d 100644
--- a/src/data/common.tsx
+++ b/src/data/common.tsx
@@ -16,7 +16,7 @@ import player from "game/player";
 import settings from "game/settings";
 import type { DecimalSource } from "util/bignum";
 import Decimal, { format, formatSmall, formatTime } from "util/bignum";
-import type { WithRequired } from "util/common";
+import { WithRequired, camelToTitle } from "util/common";
 import type {
     Computable,
     GetComputableType,
@@ -133,10 +133,10 @@ export function createResetButton<T extends ClickableOptions & ResetButtonOption
                             {unref(resetButton.conversion.buyMax) ? "Next:" : "Req:"}{" "}
                             {displayResource(
                                 resetButton.conversion.baseResource,
-                                unref(resetButton.conversion.buyMax) ||
-                                    Decimal.floor(unref(resetButton.conversion.actualGain)).neq(1)
-                                    ? unref(resetButton.conversion.nextAt)
-                                    : unref(resetButton.conversion.currentAt)
+                                !unref(resetButton.conversion.buyMax) ||
+                                    Decimal.lt(unref(resetButton.conversion.actualGain), 1)
+                                    ? unref(resetButton.conversion.currentAt)
+                                    : unref(resetButton.conversion.nextAt)
                             )}{" "}
                             {resetButton.conversion.baseResource.displayName}
                         </div>
@@ -177,11 +177,6 @@ export interface LayerTreeNodeOptions extends TreeNodeOptions {
     layerID: string;
     /** The color to display this tree node as */
     color: Computable<string>; // marking as required
-    /**
-     * The content to display in the tree node.
-     * Defaults to the layer's ID
-     */
-    display?: Computable<CoercableComponent>;
     /** Whether or not to append the layer to the tabs list.
      * If set to false, then the tree node will instead always remove all tabs to its right and then add the layer tab.
      * Defaults to true.
@@ -214,12 +209,10 @@ export function createLayerTreeNode<T extends LayerTreeNodeOptions>(
 ): LayerTreeNode<T> {
     return createTreeNode(feature => {
         const options = optionsFunc.call(feature, feature);
-        processComputable(options as T, "display");
-        setDefault(options, "display", options.layerID);
+        setDefault(options, "display", camelToTitle(options.layerID));
         processComputable(options as T, "append");
         return {
             ...options,
-            display: options.display,
             onClick: unref((options as unknown as GenericLayerTreeNode).append)
                 ? function () {
                       if (player.tabs.includes(options.layerID)) {
@@ -444,7 +437,7 @@ export function estimateTime(
         const currTarget = unref(processedTarget);
         if (Decimal.gte(resource.value, currTarget)) {
             return "Now";
-        } else if (Decimal.lt(currRate, 0)) {
+        } else if (Decimal.lte(currRate, 0)) {
             return "Never";
         }
         return formatTime(Decimal.sub(currTarget, resource.value).div(currRate));
@@ -466,7 +459,7 @@ export function createFormulaPreview(
     const processedShowPreview = convertComputable(showPreview);
     const processedPreviewAmount = convertComputable(previewAmount);
     if (!formula.hasVariable()) {
-        throw new Error("Cannot create formula preview if the formula does not have a variable");
+        console.error("Cannot create formula preview if the formula does not have a variable");
     }
     return jsx(() => {
         if (unref(processedShowPreview)) {
diff --git a/src/data/layers/prestige.tsx b/src/data/layers/prestige.tsx
index 30fe99f..6e3cb69 100644
--- a/src/data/layers/prestige.tsx
+++ b/src/data/layers/prestige.tsx
@@ -37,7 +37,7 @@ const layer = createLayer(id, function (this: BaseLayer) {
         color,
         reset
     }));
-    addTooltip(treeNode, {
+    const tooltip = addTooltip(treeNode, {
         display: createResourceTooltip(points),
         pinnable: true
     });
@@ -58,6 +58,7 @@ const layer = createLayer(id, function (this: BaseLayer) {
         name,
         color,
         points,
+        tooltip,
         display: jsx(() => (
             <>
                 <MainDisplay resource={points} color={color} />
diff --git a/src/features/achievements/achievement.tsx b/src/features/achievements/achievement.tsx
index 007dd0c..9bf454f 100644
--- a/src/features/achievements/achievement.tsx
+++ b/src/features/achievements/achievement.tsx
@@ -160,6 +160,9 @@ export function createAchievement<T extends AchievementOptions>(
 
         achievement.earned = earned;
         achievement.complete = function () {
+            if (earned.value) {
+                return;
+            }
             earned.value = true;
             const genericAchievement = achievement as GenericAchievement;
             genericAchievement.onComplete?.();
diff --git a/src/features/action.tsx b/src/features/action.tsx
index a58a762..1fbb8d3 100644
--- a/src/features/action.tsx
+++ b/src/features/action.tsx
@@ -169,7 +169,6 @@ export function createAction<T extends ActionOptions>(
             direction: Direction.Right,
             width: 100,
             height: 10,
-            style: "margin-top: 8px",
             borderStyle: "border-color: black",
             baseStyle: "margin-top: -1px",
             progress: () => Decimal.div(progress.value, unref(genericAction.duration)),
@@ -244,8 +243,9 @@ export function createAction<T extends ActionOptions>(
             decorator.postConstruct?.(action);
         }
 
-        const decoratedProps = decorators.reduce((current, next) =>
-            Object.assign(current, next.getGatheredProps?.(action))
+        const decoratedProps = decorators.reduce(
+            (current, next) => Object.assign(current, next.getGatheredProps?.(action)),
+            {}
         );
         action[GatherProps] = function (this: GenericAction) {
             const {
diff --git a/src/features/bars/Bar.vue b/src/features/bars/Bar.vue
index 89315bb..4d7bb16 100644
--- a/src/features/bars/Bar.vue
+++ b/src/features/bars/Bar.vue
@@ -120,7 +120,7 @@ export default defineComponent({
                     barStyle.clipPath = `inset(0% ${normalizedProgress.value}% 0% 0%)`;
                     break;
                 case Direction.Left:
-                    barStyle.clipPath = `inset(0% 0% 0% ${normalizedProgress.value} + '%)`;
+                    barStyle.clipPath = `inset(0% 0% 0% ${normalizedProgress.value}%)`;
                     break;
                 case Direction.Default:
                     barStyle.clipPath = "inset(0% 50% 0% 0%)";
diff --git a/src/features/boards/Board.vue b/src/features/boards/Board.vue
index 00799fe..218b302 100644
--- a/src/features/boards/Board.vue
+++ b/src/features/boards/Board.vue
@@ -19,7 +19,7 @@
         @touchstart="(e: TouchEvent) => mouseDown(e)"
         @mouseup="() => endDragging(unref(draggingNode))"
         @touchend.passive="() => endDragging(unref(draggingNode))"
-        @mouseleave="() => endDragging(unref(draggingNode))"
+        @mouseleave="() => endDragging(unref(draggingNode), true)"
     >
         <svg class="stage" width="100%" height="100%">
             <g class="g1">
@@ -28,7 +28,16 @@
                         v-for="link in unref(links) || []"
                         :key="`${link.startNode.id}-${link.endNode.id}`"
                     >
-                        <BoardLinkVue :link="link" />
+                        <BoardLinkVue
+                            :link="link"
+                            :dragging="unref(draggingNode)"
+                            :dragged="
+                                link.startNode === unref(draggingNode) ||
+                                link.endNode === unref(draggingNode)
+                                    ? dragged
+                                    : undefined
+                            "
+                        />
                     </g>
                 </transition-group>
                 <transition-group name="grow" :duration="500" appear>
@@ -38,10 +47,12 @@
                             :nodeType="types[node.type]"
                             :dragging="unref(draggingNode)"
                             :dragged="unref(draggingNode) === node ? dragged : undefined"
-                            :hasDragged="hasDragged"
-                            :receivingNode="unref(receivingNode)?.id === node.id"
-                            :selectedNode="unref(selectedNode)"
-                            :selectedAction="unref(selectedAction)"
+                            :hasDragged="unref(draggingNode) == null ? false : hasDragged"
+                            :receivingNode="unref(receivingNode) === node"
+                            :isSelected="unref(selectedNode) === node"
+                            :selectedAction="
+                                unref(selectedNode) === node ? unref(selectedAction) : null
+                            "
                             @mouseDown="mouseDown"
                             @endDragging="endDragging"
                             @clickAction="(actionId: string) => clickAction(node, actionId)"
@@ -97,6 +108,10 @@ const stage = ref<any>(null);
 
 const sortedNodes = computed(() => {
     const nodes = props.nodes.value.slice();
+    if (props.selectedNode.value) {
+        const node = nodes.splice(nodes.indexOf(props.selectedNode.value), 1)[0];
+        nodes.push(node);
+    }
     if (props.draggingNode.value) {
         const node = nodes.splice(nodes.indexOf(props.draggingNode.value), 1)[0];
         nodes.push(node);
@@ -223,7 +238,7 @@ function drag(e: MouseEvent | TouchEvent) {
     }
 }
 
-function endDragging(node: BoardNode | null) {
+function endDragging(node: BoardNode | null, mouseLeave = false) {
     if (props.draggingNode.value != null && props.draggingNode.value === node) {
         if (props.receivingNode.value == null) {
             props.draggingNode.value.position.x += Math.round(dragged.value.x / 25) * 25;
@@ -241,7 +256,7 @@ function endDragging(node: BoardNode | null) {
         }
 
         props.setDraggingNode.value(null);
-    } else if (!hasDragged.value) {
+    } else if (!hasDragged.value && !mouseLeave) {
         props.state.value.selectedNode = null;
         props.state.value.selectedAction = null;
     }
diff --git a/src/features/boards/BoardLink.vue b/src/features/boards/BoardLink.vue
index 441d996..5dacc66 100644
--- a/src/features/boards/BoardLink.vue
+++ b/src/features/boards/BoardLink.vue
@@ -1,7 +1,7 @@
 <template>
     <line
         class="link"
-        v-bind="link"
+        v-bind="linkProps"
         :class="{ pulsing: link.pulsing }"
         :x1="startPosition.x"
         :y1="startPosition.y"
@@ -11,36 +11,53 @@
 </template>
 
 <script setup lang="ts">
-import type { BoardNodeLink } from "features/boards/board";
+import type { BoardNode, BoardNodeLink } from "features/boards/board";
+import { kebabifyObject } from "util/vue";
 import { computed, toRefs, unref } from "vue";
 
 const _props = defineProps<{
     link: BoardNodeLink;
+    dragging: BoardNode | null;
+    dragged?: {
+        x: number;
+        y: number;
+    };
 }>();
 const props = toRefs(_props);
 
 const startPosition = computed(() => {
-    const position = props.link.value.startNode.position;
+    const position = { ...props.link.value.startNode.position };
     if (props.link.value.offsetStart) {
         position.x += unref(props.link.value.offsetStart).x;
         position.y += unref(props.link.value.offsetStart).y;
     }
+    if (props.dragging?.value === props.link.value.startNode) {
+        position.x += props.dragged?.value?.x ?? 0;
+        position.y += props.dragged?.value?.y ?? 0;
+    }
     return position;
 });
 
 const endPosition = computed(() => {
-    const position = props.link.value.endNode.position;
+    const position = { ...props.link.value.endNode.position };
     if (props.link.value.offsetEnd) {
         position.x += unref(props.link.value.offsetEnd).x;
         position.y += unref(props.link.value.offsetEnd).y;
     }
+    if (props.dragging?.value === props.link.value.endNode) {
+        position.x += props.dragged?.value?.x ?? 0;
+        position.y += props.dragged?.value?.y ?? 0;
+    }
     return position;
 });
+
+const linkProps = computed(() => kebabifyObject(_props.link as unknown as Record<string, unknown>));
 </script>
 
 <style scoped>
 .link {
     transition-duration: 0s;
+    pointer-events: none;
 }
 
 .link.pulsing {
diff --git a/src/features/boards/BoardNode.vue b/src/features/boards/BoardNode.vue
index b40357a..6a32f37 100644
--- a/src/features/boards/BoardNode.vue
+++ b/src/features/boards/BoardNode.vue
@@ -160,7 +160,7 @@ const _props = defineProps<{
     };
     hasDragged?: boolean;
     receivingNode?: boolean;
-    selectedNode: BoardNode | null;
+    isSelected: boolean;
     selectedAction: GenericBoardNodeAction | null;
 }>();
 const props = toRefs(_props);
@@ -170,7 +170,6 @@ const emit = defineEmits<{
     (e: "clickAction", actionId: string): void;
 }>();
 
-const isSelected = computed(() => unref(props.selectedNode) === unref(props.node));
 const isDraggable = computed(() =>
     getNodeProperty(props.nodeType.value.draggable, unref(props.node))
 );
@@ -211,7 +210,7 @@ const shape = computed(() => getNodeProperty(props.nodeType.value.shape, unref(p
 const title = computed(() => getNodeProperty(props.nodeType.value.title, unref(props.node)));
 const label = computed(
     () =>
-        (isSelected.value
+        (props.isSelected.value
             ? unref(props.selectedAction) &&
               // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
               getNodeProperty(unref(props.selectedAction)!.tooltip, unref(props.node))
@@ -297,6 +296,7 @@ function mouseUp(e: MouseEvent | TouchEvent) {
     font-family: monospace;
     font-size: 200%;
     pointer-events: none;
+    filter: drop-shadow(3px 3px 2px var(--tooltip-background));
 }
 
 .progress {
diff --git a/src/features/boards/board.ts b/src/features/boards/board.ts
index 4258345..8a9026f 100644
--- a/src/features/boards/board.ts
+++ b/src/features/boards/board.ts
@@ -104,7 +104,7 @@ export interface NodeTypeOptions {
     shape: NodeComputable<Shape>;
     /** Whether the node can accept another node being dropped upon it. */
     canAccept?: NodeComputable<boolean, [BoardNode]>;
-    /** The progress value of the node. */
+    /** The progress value of the node, from 0 to 1. */
     progress?: NodeComputable<number>;
     /** How the progress should be displayed on the node. */
     progressDisplay?: NodeComputable<ProgressDisplay>;
@@ -118,7 +118,7 @@ export interface NodeTypeOptions {
     titleColor?: NodeComputable<string>;
     /** The list of action options for the node. */
     actions?: BoardNodeActionOptions[];
-    /** The distance between the center of the node and its actions. */
+    /** The arc between each action, in radians. */
     actionDistance?: NodeComputable<number>;
     /** A function that is called when the node is clicked. */
     onClick?: (node: BoardNode) => void;
@@ -385,21 +385,6 @@ export function createBoard<T extends BoardOptions>(
                 }
             }
         });
-        board.selectedAction = computed(() => {
-            const selectedNode = processedBoard.selectedNode.value;
-            if (selectedNode == null) {
-                return null;
-            }
-            const type = processedBoard.types[selectedNode.type];
-            if (type.actions == null) {
-                return null;
-            }
-            return (
-                type.actions.find(
-                    action => action.id === unref(processedBoard.state).selectedAction
-                ) || null
-            );
-        });
         board.mousePosition = ref(null);
         if (board.links) {
             processComputable(board as T, "links");
diff --git a/src/features/challenges/challenge.tsx b/src/features/challenges/challenge.tsx
index d9fc04d..bba005b 100644
--- a/src/features/challenges/challenge.tsx
+++ b/src/features/challenges/challenge.tsx
@@ -52,8 +52,6 @@ export interface ChallengeOptions {
     reset?: GenericReset;
     /** The requirement(s) to complete this challenge. */
     requirements: Requirements;
-    /** Whether or not completing this challenge should grant multiple completions if requirements met. Requires {@link requirements} to be a requirement or array of requirements with {@link Requirement.canMaximize} true. */
-    maximize?: Computable<boolean>;
     /** The maximum number of times the challenge can be completed. */
     completionLimit?: Computable<DecimalSource>;
     /** Shows a marker on the corner of the feature. */
@@ -124,7 +122,6 @@ export type Challenge<T extends ChallengeOptions> = Replace<
         visibility: GetComputableTypeWithDefault<T["visibility"], Visibility.Visible>;
         canStart: GetComputableTypeWithDefault<T["canStart"], true>;
         requirements: GetComputableType<T["requirements"]>;
-        maximize: GetComputableType<T["maximize"]>;
         completionLimit: GetComputableTypeWithDefault<T["completionLimit"], 1>;
         mark: GetComputableTypeWithDefault<T["mark"], Ref<boolean>>;
         classes: GetComputableType<T["classes"]>;
@@ -210,10 +207,7 @@ export function createChallenge<T extends ChallengeOptions>(
             }
         };
         challenge.canComplete = computed(() =>
-            Decimal.max(
-                maxRequirementsMet((challenge as GenericChallenge).requirements),
-                unref((challenge as GenericChallenge).maximize) ? Decimal.dInf : 1
-            )
+            maxRequirementsMet((challenge as GenericChallenge).requirements)
         );
         challenge.complete = function (remainInChallenge?: boolean) {
             const genericChallenge = challenge as GenericChallenge;
@@ -254,7 +248,6 @@ export function createChallenge<T extends ChallengeOptions>(
 
         processComputable(challenge as T, "canStart");
         setDefault(challenge, "canStart", true);
-        processComputable(challenge as T, "maximize");
         processComputable(challenge as T, "completionLimit");
         setDefault(challenge, "completionLimit", 1);
         processComputable(challenge as T, "mark");
diff --git a/src/features/conversion.ts b/src/features/conversion.ts
index 9f7d176..78ad7cd 100644
--- a/src/features/conversion.ts
+++ b/src/features/conversion.ts
@@ -1,4 +1,4 @@
-import type { OptionsFunc, Replace } from "features/feature";
+import type { CoercableComponent, OptionsFunc, Replace } from "features/feature";
 import { setDefault } from "features/feature";
 import type { Resource } from "features/resources/resource";
 import Formula from "game/formulas/formulas";
@@ -12,6 +12,7 @@ import { createLazyProxy } from "util/proxies";
 import type { Ref } from "vue";
 import { computed, unref } from "vue";
 import { GenericDecorator } from "./decorators/common";
+import { createBooleanRequirement } from "game/requirements";
 
 /** An object that configures a {@link Conversion}. */
 export interface ConversionOptions {
@@ -292,3 +293,20 @@ export function setupPassiveGeneration(
         }
     });
 }
+
+/**
+ * Creates requirement that is met when the conversion hits a specified gain amount
+ * @param conversion The conversion to check the gain amount of
+ * @param minGainAmount The minimum gain amount that must be met for the requirement to be met
+ */
+export function createCanConvertRequirement(
+    conversion: GenericConversion,
+    minGainAmount: Computable<DecimalSource> = 1,
+    display?: CoercableComponent
+) {
+    const computedMinGainAmount = convertComputable(minGainAmount);
+    return createBooleanRequirement(
+        () => Decimal.gte(unref(conversion.actualGain), unref(computedMinGainAmount)),
+        display
+    );
+}
diff --git a/src/features/decorators/bonusDecorator.ts b/src/features/decorators/bonusDecorator.ts
index 636bfbe..7ee453d 100644
--- a/src/features/decorators/bonusDecorator.ts
+++ b/src/features/decorators/bonusDecorator.ts
@@ -69,14 +69,12 @@ export const bonusAmountDecorator: Decorator<
     BaseBonusAmountFeature,
     GenericBonusAmountFeature
 > = {
-    preConstruct(feature) {
+    postConstruct(feature) {
         if (feature.amount === undefined) {
             console.error(
                 `Decorated feature ${feature.id} does not contain the required 'amount' property"`
             );
         }
-    },
-    postConstruct(feature) {
         processComputable(feature, "bonusAmount");
         if (feature.totalAmount === undefined) {
             feature.totalAmount = computed(() =>
diff --git a/src/features/decorators/common.ts b/src/features/decorators/common.ts
index 8d76b37..07783bb 100644
--- a/src/features/decorators/common.ts
+++ b/src/features/decorators/common.ts
@@ -27,8 +27,8 @@ export type Decorator<
 
 export type GenericDecorator = Decorator<unknown>;
 
-export interface EffectFeatureOptions {
-    effect: Computable<unknown>;
+export interface EffectFeatureOptions<T = unknown> {
+    effect: Computable<T>;
 }
 
 export type EffectFeature<T extends EffectFeatureOptions> = Replace<
@@ -36,9 +36,9 @@ export type EffectFeature<T extends EffectFeatureOptions> = Replace<
     { effect: GetComputableType<T["effect"]> }
 >;
 
-export type GenericEffectFeature = Replace<
+export type GenericEffectFeature<T = unknown> = Replace<
     EffectFeature<EffectFeatureOptions>,
-    { effect: ProcessedComputable<unknown> }
+    { effect: ProcessedComputable<T> }
 >;
 
 /**
diff --git a/src/features/links/Link.vue b/src/features/links/Link.vue
index f7b9580..815f511 100644
--- a/src/features/links/Link.vue
+++ b/src/features/links/Link.vue
@@ -2,7 +2,7 @@
     <line
         stroke-width="15px"
         stroke="white"
-        v-bind="link"
+        v-bind="linkProps"
         :x1="startPosition.x"
         :y1="startPosition.y"
         :x2="endPosition.x"
@@ -13,6 +13,7 @@
 <script setup lang="ts">
 import type { Link } from "features/links/links";
 import type { FeatureNode } from "game/layers";
+import { kebabifyObject } from "util/vue";
 import { computed, toRefs } from "vue";
 
 const _props = defineProps<{
@@ -54,4 +55,6 @@ const endPosition = computed(() => {
     }
     return position;
 });
+
+const linkProps = computed(() => kebabifyObject(_props.link as unknown as Record<string, unknown>));
 </script>
diff --git a/src/features/repeatable.tsx b/src/features/repeatable.tsx
index d9bf372..e82f8eb 100644
--- a/src/features/repeatable.tsx
+++ b/src/features/repeatable.tsx
@@ -67,8 +67,6 @@ export interface RepeatableOptions {
     mark?: Computable<boolean | string>;
     /** Toggles a smaller design for the feature. */
     small?: Computable<boolean>;
-    /** Whether or not clicking this repeatable should attempt to maximize amount based on the requirements met. Requires {@link requirements} to be a requirement or array of requirements with {@link Requirement.canMaximize} true. */
-    maximize?: Computable<boolean>;
     /** The display to use for this repeatable. */
     display?: Computable<RepeatableDisplay>;
 }
@@ -87,7 +85,6 @@ export interface BaseRepeatable {
     canClick: ProcessedComputable<boolean>;
     /**
      * How much amount can be increased by, or 1 if unclickable.
-     * Capped at 1 if {@link RepeatableOptions.maximize} is false.
      **/
     amountToIncrease: Ref<DecimalSource>;
     /** A function that gets called when this repeatable is clicked. */
@@ -111,7 +108,6 @@ export type Repeatable<T extends RepeatableOptions> = Replace<
         style: GetComputableType<T["style"]>;
         mark: GetComputableType<T["mark"]>;
         small: GetComputableType<T["small"]>;
-        maximize: GetComputableType<T["maximize"]>;
         display: Ref<CoercableComponent>;
     }
 >;
@@ -162,7 +158,8 @@ export function createRepeatable<T extends RepeatableOptions>(
                 )
             ),
             requiresPay: false,
-            visibility: Visibility.None
+            visibility: Visibility.None,
+            canMaximize: true
         } as const;
         const visibilityRequirement = createVisibilityRequirement(repeatable as GenericRepeatable);
         if (isArray(repeatable.requirements)) {
@@ -194,9 +191,7 @@ export function createRepeatable<T extends RepeatableOptions>(
             return currClasses;
         });
         repeatable.amountToIncrease = computed(() =>
-            unref((repeatable as GenericRepeatable).maximize)
-                ? maxRequirementsMet(repeatable.requirements)
-                : 1
+            Decimal.clampMin(maxRequirementsMet(repeatable.requirements), 1)
         );
         repeatable.canClick = computed(() => requirementsMet(repeatable.requirements));
         const onClick = repeatable.onClick;
@@ -205,8 +200,12 @@ export function createRepeatable<T extends RepeatableOptions>(
             if (!unref(genericRepeatable.canClick)) {
                 return;
             }
-            payRequirements(repeatable.requirements, unref(repeatable.amountToIncrease));
-            genericRepeatable.amount.value = Decimal.add(genericRepeatable.amount.value, 1);
+            const amountToIncrease = unref(repeatable.amountToIncrease) ?? 1;
+            payRequirements(repeatable.requirements, amountToIncrease);
+            genericRepeatable.amount.value = Decimal.add(
+                genericRepeatable.amount.value,
+                amountToIncrease
+            );
             onClick?.(event);
         };
         processComputable(repeatable as T, "display");
@@ -235,12 +234,10 @@ export function createRepeatable<T extends RepeatableOptions>(
                         {currDisplay.showAmount === false ? null : (
                             <div>
                                 <br />
-                                joinJSX(
-                                <>Amount: {formatWhole(genericRepeatable.amount.value)}</>,
-                                {unref(genericRepeatable.limit) !== Decimal.dInf ? (
+                                <>Amount: {formatWhole(genericRepeatable.amount.value)}</>
+                                {Decimal.isFinite(unref(genericRepeatable.limit)) ? (
                                     <> / {formatWhole(unref(genericRepeatable.limit))}</>
                                 ) : undefined}
-                                )
                             </div>
                         )}
                         {currDisplay.effectDisplay == null ? null : (
@@ -271,7 +268,6 @@ export function createRepeatable<T extends RepeatableOptions>(
         processComputable(repeatable as T, "style");
         processComputable(repeatable as T, "mark");
         processComputable(repeatable as T, "small");
-        processComputable(repeatable as T, "maximize");
 
         for (const decorator of decorators) {
             decorator.postConstruct?.(repeatable);
diff --git a/src/features/reset.ts b/src/features/reset.ts
index b7c40ed..2b31e64 100644
--- a/src/features/reset.ts
+++ b/src/features/reset.ts
@@ -1,8 +1,9 @@
 import type { OptionsFunc, Replace } from "features/feature";
 import { getUniqueID } from "features/feature";
 import { globalBus } from "game/events";
+import Formula from "game/formulas/formulas";
 import type { BaseLayer } from "game/layers";
-import type { NonPersistent, Persistent } from "game/persistence";
+import { NonPersistent, Persistent, SkipPersistence } from "game/persistence";
 import { DefaultValue, persistent } from "game/persistence";
 import type { Unsubscribe } from "nanoevents";
 import Decimal from "util/bignum";
@@ -19,7 +20,7 @@ export const ResetType = Symbol("Reset");
  */
 export interface ResetOptions {
     /** List of things to reset. Can include objects which will be recursed over for persistent values. */
-    thingsToReset: Computable<Record<string, unknown>[]>;
+    thingsToReset: Computable<unknown[]>;
     /** A function that is called when the reset is performed. */
     onReset?: VoidFunction;
 }
@@ -61,7 +62,15 @@ export function createReset<T extends ResetOptions>(
 
         reset.reset = function () {
             const handleObject = (obj: unknown) => {
-                if (obj != null && typeof obj === "object") {
+                if (
+                    obj != null &&
+                    typeof obj === "object" &&
+                    !(obj instanceof Decimal) &&
+                    !(obj instanceof Formula)
+                ) {
+                    if (SkipPersistence in obj && obj[SkipPersistence] === true) {
+                        return;
+                    }
                     if (DefaultValue in obj) {
                         const persistent = obj as NonPersistent;
                         persistent.value = persistent[DefaultValue];
diff --git a/src/features/tabs/tabFamily.ts b/src/features/tabs/tabFamily.ts
index 2ca544b..aa7fafc 100644
--- a/src/features/tabs/tabFamily.ts
+++ b/src/features/tabs/tabFamily.ts
@@ -151,8 +151,7 @@ export function createTabFamily<T extends TabFamilyOptions>(
     optionsFunc?: OptionsFunc<T, BaseTabFamily, GenericTabFamily>
 ): TabFamily<T> {
     if (Object.keys(tabs).length === 0) {
-        console.warn("Cannot create tab family with 0 tabs");
-        throw new Error("Cannot create tab family with 0 tabs");
+        console.error("Cannot create tab family with 0 tabs");
     }
 
     const selected = persistent(Object.keys(tabs)[0], false);
diff --git a/src/features/tooltips/tooltip.ts b/src/features/tooltips/tooltip.ts
index 129bd16..54d782c 100644
--- a/src/features/tooltips/tooltip.ts
+++ b/src/features/tooltips/tooltip.ts
@@ -52,7 +52,7 @@ export interface BaseTooltip {
 export type Tooltip<T extends TooltipOptions> = Replace<
     T & BaseTooltip,
     {
-        pinnable: T["pinnable"] extends undefined ? false : T["pinnable"];
+        pinnable: undefined extends T["pinnable"] ? false : T["pinnable"];
         pinned: T["pinnable"] extends true ? Ref<boolean> : undefined;
         display: GetComputableType<T["display"]>;
         classes: GetComputableType<T["classes"]>;
@@ -95,18 +95,6 @@ export function addTooltip<T extends TooltipOptions>(
     }
 
     nextTick(() => {
-        if (options.pinnable) {
-            if ("pinned" in element) {
-                console.error(
-                    "Cannot add pinnable tooltip to element that already has a property called 'pinned'"
-                );
-                options.pinnable = false;
-                deletePersistent(options.pinned as Persistent<boolean>);
-            } else {
-                // eslint-disable-next-line @typescript-eslint/no-explicit-any
-                (element as any).pinned = options.pinned;
-            }
-        }
         const elementComponent = element[Component];
         element[Component] = TooltipComponent as GenericComponent;
         const elementGatherProps = element[GatherProps].bind(element);
diff --git a/src/features/trees/TreeNode.vue b/src/features/trees/TreeNode.vue
index ea48eeb..b6ce3d3 100644
--- a/src/features/trees/TreeNode.vue
+++ b/src/features/trees/TreeNode.vue
@@ -113,7 +113,6 @@ export default defineComponent({
     color: rgba(0, 0, 0, 0.5);
     text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.25);
     box-shadow: -4px -4px 4px rgba(0, 0, 0, 0.25) inset, 0px 0px 20px var(--background);
-    text-transform: capitalize;
     display: flex;
 }
 
diff --git a/src/features/upgrades/upgrade.ts b/src/features/upgrades/upgrade.ts
index 3861c5e..9ff9b28 100644
--- a/src/features/upgrades/upgrade.ts
+++ b/src/features/upgrades/upgrade.ts
@@ -137,7 +137,9 @@ export function createUpgrade<T extends UpgradeOptions>(
         upgrade.bought = bought;
         Object.assign(upgrade, decoratedData);
 
-        upgrade.canPurchase = computed(() => requirementsMet(upgrade.requirements));
+        upgrade.canPurchase = computed(
+            () => !bought.value && requirementsMet(upgrade.requirements)
+        );
         upgrade.purchase = function () {
             const genericUpgrade = upgrade as GenericUpgrade;
             if (!unref(genericUpgrade.canPurchase)) {
diff --git a/src/game/formulas/formulas.ts b/src/game/formulas/formulas.ts
index bf989b1..7f88d0c 100644
--- a/src/game/formulas/formulas.ts
+++ b/src/game/formulas/formulas.ts
@@ -2,7 +2,7 @@ import { Resource } from "features/resources/resource";
 import { NonPersistent } from "game/persistence";
 import Decimal, { DecimalSource, format } from "util/bignum";
 import { Computable, ProcessedComputable, convertComputable } from "util/computed";
-import { ComputedRef, Ref, computed, ref, unref } from "vue";
+import { Ref, computed, ref, unref } from "vue";
 import * as ops from "./operations";
 import type {
     EvaluateFunction,
@@ -104,7 +104,7 @@ export abstract class InternalFormula<T extends [FormulaSource] | FormulaSource[
 
     private setupConstant({ inputs }: { inputs: [FormulaSource] }): InternalFormulaProperties<T> {
         if (inputs.length !== 1) {
-            throw new Error("Evaluate function is required if inputs is not length 1");
+            console.error("Evaluate function is required if inputs is not length 1");
         }
         return {
             inputs: inputs as T,
@@ -124,11 +124,14 @@ export abstract class InternalFormula<T extends [FormulaSource] | FormulaSource[
 
         const innermostVariable = numVariables === 1 ? variable?.innermostVariable : undefined;
 
+        const invertible = variable?.isInvertible() ?? false;
+        const integrable = variable?.isIntegrable() ?? false;
+
         return {
             inputs,
             internalEvaluate: evaluate,
-            internalInvert: invert,
-            internalIntegrate: integrate,
+            internalInvert: invertible ? invert : undefined,
+            internalIntegrate: integrable ? integrate : undefined,
             internalIntegrateInner: integrateInner,
             applySubstitution,
             innermostVariable,
@@ -226,15 +229,16 @@ export abstract class InternalFormula<T extends [FormulaSource] | FormulaSource[
         start: Computable<DecimalSource>,
         formulaModifier: (value: InvertibleIntegralFormula) => GenericFormula
     ) {
-        const lhsRef = ref<DecimalSource>(0);
-        const formula = formulaModifier(Formula.variable(lhsRef));
+        const formula = formulaModifier(Formula.variable(0));
         const processedStart = convertComputable(start);
         function evalStep(lhs: DecimalSource) {
             if (Decimal.lt(lhs, unref(processedStart))) {
                 return lhs;
             }
-            lhsRef.value = Decimal.sub(lhs, unref(processedStart));
-            return Decimal.add(formula.evaluate(), unref(processedStart));
+            return Decimal.add(
+                formula.evaluate(Decimal.sub(lhs, unref(processedStart))),
+                unref(processedStart)
+            );
         }
         function invertStep(value: DecimalSource, lhs: FormulaSource) {
             if (hasVariable(lhs) && formula.isInvertible()) {
@@ -246,7 +250,8 @@ export abstract class InternalFormula<T extends [FormulaSource] | FormulaSource[
                 }
                 return lhs.invert(value);
             }
-            throw new Error("Could not invert due to no input being a variable");
+            console.error("Could not invert due to no input being a variable");
+            return 0;
         }
         return new Formula({
             inputs: [value],
@@ -290,7 +295,8 @@ export abstract class InternalFormula<T extends [FormulaSource] | FormulaSource[
                 !formula.isInvertible() ||
                 (elseFormula != null && !elseFormula.isInvertible())
             ) {
-                throw new Error("Could not invert due to no input being a variable");
+                console.error("Could not invert due to no input being a variable");
+                return 0;
             }
             if (unref(processedCondition)) {
                 return lhs.invert(formula.invert(value));
@@ -339,19 +345,35 @@ export abstract class InternalFormula<T extends [FormulaSource] | FormulaSource[
     public static sgn = InternalFormula.sign;
 
     public static round(value: FormulaSource) {
-        return new Formula({ inputs: [value], evaluate: Decimal.round });
+        return new Formula({
+            inputs: [value],
+            evaluate: Decimal.round,
+            invert: ops.invertPassthrough
+        });
     }
 
     public static floor(value: FormulaSource) {
-        return new Formula({ inputs: [value], evaluate: Decimal.floor });
+        return new Formula({
+            inputs: [value],
+            evaluate: Decimal.floor,
+            invert: ops.invertPassthrough
+        });
     }
 
     public static ceil(value: FormulaSource) {
-        return new Formula({ inputs: [value], evaluate: Decimal.ceil });
+        return new Formula({
+            inputs: [value],
+            evaluate: Decimal.ceil,
+            invert: ops.invertPassthrough
+        });
     }
 
     public static trunc(value: FormulaSource) {
-        return new Formula({ inputs: [value], evaluate: Decimal.trunc });
+        return new Formula({
+            inputs: [value],
+            evaluate: Decimal.trunc,
+            invert: ops.invertPassthrough
+        });
     }
 
     public static add<T extends GenericFormula>(value: T, other: FormulaSource): T;
@@ -453,7 +475,7 @@ export abstract class InternalFormula<T extends [FormulaSource] | FormulaSource[
         return new Formula({
             inputs: [value, min, max],
             evaluate: Decimal.clamp,
-            invert: ops.passthrough as InvertFunction<[FormulaSource, FormulaSource, FormulaSource]>
+            invert: ops.invertPassthrough
         });
     }
 
@@ -1256,7 +1278,8 @@ export default class Formula<
         } else if (this.inputs.length === 1 && this.hasVariable()) {
             return value;
         }
-        throw new Error("Cannot invert non-invertible formula");
+        console.error("Cannot invert non-invertible formula");
+        return 0;
     }
 
     /**
@@ -1266,7 +1289,8 @@ export default class Formula<
      */
     evaluateIntegral(variable?: DecimalSource): DecimalSource {
         if (!this.isIntegrable()) {
-            throw new Error("Cannot evaluate integral of formula without integral");
+            console.error("Cannot evaluate integral of formula without integral");
+            return 0;
         }
         return this.getIntegralFormula().evaluate(variable);
     }
@@ -1278,7 +1302,8 @@ export default class Formula<
      */
     invertIntegral(value: DecimalSource): DecimalSource {
         if (!this.isIntegrable() || !this.getIntegralFormula().isInvertible()) {
-            throw new Error("Cannot invert integral of formula without invertible integral");
+            console.error("Cannot invert integral of formula without invertible integral");
+            return 0;
         }
         return (this.getIntegralFormula() as InvertibleFormula).invert(value);
     }
@@ -1305,7 +1330,8 @@ export default class Formula<
                 // We're the complex operation of this formula
                 stack = [];
                 if (this.internalIntegrate == null) {
-                    throw new Error("Cannot integrate formula with non-integrable operation");
+                    console.error("Cannot integrate formula with non-integrable operation");
+                    return Formula.constant(0);
                 }
                 let value = this.internalIntegrate.call(this, stack, ...this.inputs);
                 stack.forEach(func => (value = func(value)));
@@ -1325,14 +1351,16 @@ export default class Formula<
                 ) {
                     this.integralFormula = this;
                 } else {
-                    throw new Error("Cannot integrate formula without variable");
+                    console.error("Cannot integrate formula without variable");
+                    return Formula.constant(0);
                 }
             }
             return this.integralFormula;
         } else {
             // "Inner" part of the formula
             if (this.applySubstitution == null) {
-                throw new Error("Cannot have two complex operations in an integrable formula");
+                console.error("Cannot have two complex operations in an integrable formula");
+                return Formula.constant(0);
             }
             stack.push((variable: GenericFormula) =>
                 // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
@@ -1349,7 +1377,8 @@ export default class Formula<
             ) {
                 return this;
             } else {
-                throw new Error("Cannot integrate formula without variable");
+                console.error("Cannot integrate formula without variable");
+                return Formula.constant(0);
             }
         }
     }
@@ -1396,58 +1425,70 @@ export function printFormula(formula: FormulaSource): string {
 }
 
 /**
- * Utility for calculating the maximum amount of purchases possible with a given formula and resource. If {@link spendResources} is changed to false, the calculation will be much faster with higher numbers.
+ * Utility for calculating the maximum amount of purchases possible with a given formula and resource. If {@link cumulativeCost} is changed to false, the calculation will be much faster with higher numbers.
  * @param formula The formula to use for calculating buy max from
  * @param resource The resource used when purchasing (is only read from)
- * @param spendResources Whether or not to count spent resources on each purchase or not. If true, costs will be approximated for performance, skewing towards fewer purchases
- * @param summedPurchases How many of the most expensive purchases should be manually summed for better accuracy. If unspecified uses 10 when spending resources and 0 when not
+ * @param cumulativeCost Whether or not to count spent resources on each purchase or not. If true, costs will be approximated for performance, skewing towards fewer purchases
+ * @param directSum How many of the most expensive purchases should be manually summed for better accuracy. If unspecified uses 10 when spending resources and 0 when not
+ * @param maxBulkAmount Cap on how many can be purchased at once. If equal to 1 or lte to {@link directSum} then the formula does not need to be invertible. Defaults to Infinity.
  */
 export function calculateMaxAffordable(
-    formula: InvertibleFormula,
-    resource: Resource,
-    spendResources?: true,
-    summedPurchases?: number
-): ComputedRef<DecimalSource>;
-export function calculateMaxAffordable(
-    formula: InvertibleIntegralFormula,
-    resource: Resource,
-    spendResources: Computable<boolean>,
-    summedPurchases?: number
-): ComputedRef<DecimalSource>;
-export function calculateMaxAffordable(
-    formula: InvertibleFormula,
+    formula: GenericFormula,
     resource: Resource,
-    spendResources: Computable<boolean> = true,
-    summedPurchases?: number
+    cumulativeCost: Computable<boolean> = true,
+    directSum?: Computable<number>,
+    maxBulkAmount: Computable<DecimalSource> = Decimal.dInf
 ) {
-    const computedSpendResources = convertComputable(spendResources);
+    const computedCumulativeCost = convertComputable(cumulativeCost);
+    const computedDirectSum = convertComputable(directSum);
+    const computedmaxBulkAmount = convertComputable(maxBulkAmount);
     return computed(() => {
-        let affordable;
-        if (unref(computedSpendResources)) {
-            if (!formula.isIntegrable() || !formula.isIntegralInvertible()) {
-                throw new Error(
-                    "Cannot calculate max affordable of formula with non-invertible integral"
-                );
-            }
-            affordable = Decimal.floor(
-                formula.invertIntegral(Decimal.add(resource.value, formula.evaluateIntegral()))
-            ).sub(unref(formula.innermostVariable) ?? 0);
-            if (summedPurchases == null) {
-                summedPurchases = 10;
-            }
-        } else {
+        const maxBulkAmount = unref(computedmaxBulkAmount);
+        if (Decimal.eq(maxBulkAmount, 1)) {
+            return Decimal.gte(resource.value, formula.evaluate()) ? Decimal.dOne : Decimal.dZero;
+        }
+
+        const cumulativeCost = unref(computedCumulativeCost);
+        const directSum = unref(computedDirectSum) ?? (cumulativeCost ? 10 : 0);
+        let affordable: DecimalSource = 0;
+        if (Decimal.gt(maxBulkAmount, directSum)) {
             if (!formula.isInvertible()) {
-                throw new Error("Cannot calculate max affordable of non-invertible formula");
+                console.error(
+                    "Cannot calculate max affordable of non-invertible formula with more maxBulkAmount than directSum"
+                );
+                return 0;
             }
-            affordable = Decimal.floor(formula.invert(resource.value));
-            if (summedPurchases == null) {
-                summedPurchases = 0;
+            if (cumulativeCost) {
+                if (!formula.isIntegralInvertible()) {
+                    console.error(
+                        "Cannot calculate max affordable of formula with non-invertible integral"
+                    );
+                    return 0;
+                }
+                affordable = Decimal.floor(
+                    formula.invertIntegral(Decimal.add(resource.value, formula.evaluateIntegral()))
+                ).sub(unref(formula.innermostVariable) ?? 0);
+            } else {
+                affordable = Decimal.floor(formula.invert(resource.value));
             }
         }
-        if (summedPurchases > 0 && Decimal.lt(calculateCost(formula, affordable, true, 0), 1e308)) {
-            affordable = affordable.sub(summedPurchases).clampMin(0);
-            let summedCost = calculateCost(formula, affordable, true, 0);
-            while (true) {
+        affordable = Decimal.clampMax(affordable, maxBulkAmount);
+        if (directSum > 0) {
+            const preSumAffordable = affordable;
+            affordable = Decimal.sub(affordable, directSum).clampMin(0);
+            let summedCost;
+            if (cumulativeCost) {
+                summedCost = calculateCost(formula as InvertibleFormula, affordable, true, 0);
+            } else {
+                summedCost = formula.evaluate(
+                    Decimal.add(unref(formula.innermostVariable) ?? 0, affordable)
+                );
+            }
+            while (
+                Decimal.lt(affordable, maxBulkAmount) &&
+                Decimal.lt(affordable, Number.MAX_SAFE_INTEGER) &&
+                Decimal.add(preSumAffordable, 1).gte(affordable)
+            ) {
                 const nextCost = formula.evaluate(
                     affordable.add(unref(formula.innermostVariable) ?? 0)
                 );
@@ -1464,65 +1505,78 @@ export function calculateMaxAffordable(
 }
 
 /**
- * Utility for calculating the cost of a formula for a given amount of purchases. If {@link spendResources} is changed to false, the calculation will be much faster with higher numbers.
+ * Utility for calculating the cost of a formula for a given amount of purchases. If {@link cumulativeCost} is changed to false, the calculation will be much faster with higher numbers.
  * @param formula The formula to use for calculating buy max from
  * @param amountToBuy The amount of purchases to calculate the cost for
- * @param spendResources Whether or not to count spent resources on each purchase or not. If true, costs will be approximated for performance, skewing towards higher cost
- * @param summedPurchases How many purchases to manually sum for improved accuracy. If not specified, defaults to 10 when spending resources and 0 when not
+ * @param cumulativeCost Whether or not to count spent resources on each purchase or not. If true, costs will be approximated for performance, skewing towards higher cost
+ * @param directSum How many purchases to manually sum for improved accuracy. If not specified, defaults to 10 when cost is cumulative and 0 when not
  */
 export function calculateCost(
     formula: InvertibleFormula,
     amountToBuy: DecimalSource,
-    spendResources?: true,
-    summedPurchases?: number
+    cumulativeCost?: true,
+    directSum?: number
 ): DecimalSource;
 export function calculateCost(
     formula: InvertibleIntegralFormula,
     amountToBuy: DecimalSource,
-    spendResources: boolean,
-    summedPurchases?: number
+    cumulativeCost: boolean,
+    directSum?: number
 ): DecimalSource;
 export function calculateCost(
     formula: InvertibleFormula,
     amountToBuy: DecimalSource,
-    spendResources = true,
-    summedPurchases?: number
+    cumulativeCost = true,
+    directSum?: number
 ) {
-    let newValue = Decimal.add(amountToBuy, unref(formula.innermostVariable) ?? 0);
-    if (spendResources) {
-        if (!formula.isIntegrable()) {
-            throw new Error(
-                "Cannot calculate cost with spending resources of non-integrable formula"
-            );
-        }
-        const targetValue = newValue;
-        newValue = newValue
-            .sub(summedPurchases ?? 10)
-            .clampMin(unref(formula.innermostVariable) ?? 0);
-        let cost = Decimal.sub(formula.evaluateIntegral(newValue), formula.evaluateIntegral());
-        if (targetValue.gt(1e308)) {
-            // Too large of a number for summedPurchases to make a difference,
-            // just get the cost and multiply by summed purchases
-            return cost.add(Decimal.sub(targetValue, newValue).times(formula.evaluate(newValue)));
-        }
-        for (let i = newValue.toNumber(); i < targetValue.toNumber(); i++) {
-            cost = cost.add(formula.evaluate(i));
+    // Single purchase
+    if (Decimal.eq(amountToBuy, 1)) {
+        return formula.evaluate();
+    }
+
+    const origValue = unref(formula.innermostVariable) ?? 0;
+    let newValue = Decimal.add(amountToBuy, origValue);
+    const targetValue = newValue;
+    directSum ??= cumulativeCost ? 10 : 0;
+    newValue = newValue.sub(directSum).clampMin(origValue);
+    let cost: DecimalSource = 0;
+
+    // Indirect sum
+    if (Decimal.gt(amountToBuy, directSum)) {
+        if (!formula.isInvertible()) {
+            console.error("Cannot calculate cost with indirect sum of non-invertible formula");
+            return 0;
         }
-        return cost;
-    } else {
-        const targetValue = newValue;
-        newValue = newValue
-            .sub(summedPurchases ?? 0)
-            .clampMin(unref(formula.innermostVariable) ?? 0);
-        let cost = formula.evaluate(newValue);
-        if (targetValue.gt(1e308)) {
-            // Too large of a number for summedPurchases to make a difference,
-            // just get the cost and multiply by summed purchases
-            return Decimal.sub(targetValue, newValue).add(1).times(cost);
-        }
-        for (let i = newValue.toNumber(); i < targetValue.toNumber(); i++) {
-            cost = Decimal.add(cost, formula.evaluate(i));
+        if (cumulativeCost) {
+            if (!formula.isIntegrable()) {
+                console.error(
+                    "Cannot calculate cost with cumulative cost of non-integrable formula"
+                );
+                return 0;
+            }
+            cost = Decimal.sub(formula.evaluateIntegral(newValue), formula.evaluateIntegral());
+            if (targetValue.gt(1e308)) {
+                // Too large of a number for directSum to make a difference,
+                // just get the cost and multiply by summed purchases
+                return Decimal.add(
+                    cost,
+                    Decimal.sub(targetValue, newValue).times(formula.evaluate(newValue))
+                );
+            }
+        } else {
+            cost = formula.evaluate(newValue);
+            newValue = newValue.add(1);
+            if (targetValue.gt(1e308)) {
+                // Too large of a number for directSum to make a difference,
+                // just get the cost and multiply by summed purchases
+                return Decimal.sub(targetValue, newValue).add(1).times(cost);
+            }
         }
-        return cost;
     }
+
+    // Direct sum
+    for (let i = newValue.toNumber(); i < targetValue.toNumber(); i++) {
+        cost = Decimal.add(cost, formula.evaluate(i));
+    }
+    return cost;
 }
diff --git a/src/game/formulas/operations.ts b/src/game/formulas/operations.ts
index 0e39d58..586319e 100644
--- a/src/game/formulas/operations.ts
+++ b/src/game/formulas/operations.ts
@@ -1,6 +1,12 @@
 import Decimal, { DecimalSource } from "util/bignum";
 import Formula, { hasVariable, unrefFormulaSource } from "./formulas";
-import { FormulaSource, GenericFormula, InvertFunction, SubstitutionStack } from "./types";
+import {
+    FormulaSource,
+    GenericFormula,
+    InvertFunction,
+    InvertibleFormula,
+    SubstitutionStack
+} from "./types";
 
 const ln10 = Decimal.ln(10);
 
@@ -8,21 +14,33 @@ export function passthrough<T extends GenericFormula | DecimalSource>(value: T):
     return value;
 }
 
+export function invertPassthrough(value: DecimalSource, ...inputs: FormulaSource[]) {
+    const variable = inputs.find(input => hasVariable(input)) as InvertibleFormula | undefined;
+    if (variable == null) {
+        console.error("Could not invert due to no input being a variable");
+        return 0;
+    }
+    return variable.invert(value);
+}
+
 export function invertNeg(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.neg(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateNeg(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         return Formula.neg(lhs.getIntegralFormula(stack));
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function applySubstitutionNeg(value: GenericFormula) {
@@ -35,24 +53,28 @@ export function invertAdd(value: DecimalSource, lhs: FormulaSource, rhs: Formula
     } else if (hasVariable(rhs)) {
         return rhs.invert(Decimal.sub(value, unrefFormulaSource(lhs)));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateAdd(stack: SubstitutionStack, lhs: FormulaSource, rhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.times(rhs, lhs.innermostVariable ?? 0).add(x);
     } else if (hasVariable(rhs)) {
         if (!rhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = rhs.getIntegralFormula(stack);
         return Formula.times(lhs, rhs.innermostVariable ?? 0).add(x);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function integrateInnerAdd(
@@ -62,18 +84,21 @@ export function integrateInnerAdd(
 ) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.add(x, rhs);
     } else if (hasVariable(rhs)) {
         if (!rhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = rhs.getIntegralFormula(stack);
         return Formula.add(x, lhs);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertSub(value: DecimalSource, lhs: FormulaSource, rhs: FormulaSource) {
@@ -82,24 +107,28 @@ export function invertSub(value: DecimalSource, lhs: FormulaSource, rhs: Formula
     } else if (hasVariable(rhs)) {
         return rhs.invert(Decimal.sub(unrefFormulaSource(lhs), value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateSub(stack: SubstitutionStack, lhs: FormulaSource, rhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.sub(x, Formula.times(rhs, lhs.innermostVariable ?? 0));
     } else if (hasVariable(rhs)) {
         if (!rhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = rhs.getIntegralFormula(stack);
         return Formula.times(lhs, rhs.innermostVariable ?? 0).sub(x);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function integrateInnerSub(
@@ -109,18 +138,21 @@ export function integrateInnerSub(
 ) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.sub(x, rhs);
     } else if (hasVariable(rhs)) {
         if (!rhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = rhs.getIntegralFormula(stack);
         return Formula.sub(x, lhs);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertMul(value: DecimalSource, lhs: FormulaSource, rhs: FormulaSource) {
@@ -129,24 +161,28 @@ export function invertMul(value: DecimalSource, lhs: FormulaSource, rhs: Formula
     } else if (hasVariable(rhs)) {
         return rhs.invert(Decimal.div(value, unrefFormulaSource(lhs)));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateMul(stack: SubstitutionStack, lhs: FormulaSource, rhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.times(x, rhs);
     } else if (hasVariable(rhs)) {
         if (!rhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = rhs.getIntegralFormula(stack);
         return Formula.times(x, lhs);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function applySubstitutionMul(
@@ -159,7 +195,8 @@ export function applySubstitutionMul(
     } else if (hasVariable(rhs)) {
         return Formula.div(value, lhs);
     }
-    throw new Error("Could not apply substitution due to no input being a variable");
+    console.error("Could not apply substitution due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertDiv(value: DecimalSource, lhs: FormulaSource, rhs: FormulaSource) {
@@ -168,24 +205,28 @@ export function invertDiv(value: DecimalSource, lhs: FormulaSource, rhs: Formula
     } else if (hasVariable(rhs)) {
         return rhs.invert(Decimal.div(unrefFormulaSource(lhs), value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateDiv(stack: SubstitutionStack, lhs: FormulaSource, rhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.div(x, rhs);
     } else if (hasVariable(rhs)) {
         if (!rhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = rhs.getIntegralFormula(stack);
         return Formula.div(lhs, x);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function applySubstitutionDiv(
@@ -198,32 +239,37 @@ export function applySubstitutionDiv(
     } else if (hasVariable(rhs)) {
         return Formula.mul(value, lhs);
     }
-    throw new Error("Could not apply substitution due to no input being a variable");
+    console.error("Could not apply substitution due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertRecip(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.recip(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateRecip(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.ln(x);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertLog10(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.pow10(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 function internalIntegrateLog10(lhs: DecimalSource) {
@@ -235,13 +281,15 @@ function internalInvertIntegralLog10(value: DecimalSource, lhs: FormulaSource) {
         const numerator = ln10.times(value);
         return lhs.invert(numerator.div(numerator.div(Math.E).lambertw()));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateLog10(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         return new Formula({
             inputs: [lhs.getIntegralFormula(stack)],
@@ -249,7 +297,8 @@ export function integrateLog10(stack: SubstitutionStack, lhs: FormulaSource) {
             invert: internalInvertIntegralLog10
         });
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertLog(value: DecimalSource, lhs: FormulaSource, rhs: FormulaSource) {
@@ -258,7 +307,8 @@ export function invertLog(value: DecimalSource, lhs: FormulaSource, rhs: Formula
     } else if (hasVariable(rhs)) {
         return rhs.invert(Decimal.root(unrefFormulaSource(lhs), value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 function internalIntegrateLog(lhs: DecimalSource, rhs: DecimalSource) {
@@ -270,13 +320,15 @@ function internalInvertIntegralLog(value: DecimalSource, lhs: FormulaSource, rhs
         const numerator = Decimal.ln(unrefFormulaSource(rhs)).times(value);
         return lhs.invert(numerator.div(numerator.div(Math.E).lambertw()));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateLog(stack: SubstitutionStack, lhs: FormulaSource, rhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         return new Formula({
             inputs: [lhs.getIntegralFormula(stack), rhs],
@@ -284,14 +336,16 @@ export function integrateLog(stack: SubstitutionStack, lhs: FormulaSource, rhs:
             invert: internalInvertIntegralLog
         });
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertLog2(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.pow(2, value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 function internalIntegrateLog2(lhs: DecimalSource) {
@@ -303,13 +357,15 @@ function internalInvertIntegralLog2(value: DecimalSource, lhs: FormulaSource) {
         const numerator = Decimal.ln(2).times(value);
         return lhs.invert(numerator.div(numerator.div(Math.E).lambertw()));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateLog2(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         return new Formula({
             inputs: [lhs.getIntegralFormula(stack)],
@@ -317,14 +373,16 @@ export function integrateLog2(stack: SubstitutionStack, lhs: FormulaSource) {
             invert: internalInvertIntegralLog2
         });
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertLn(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.exp(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 function internalIntegrateLn(lhs: DecimalSource) {
@@ -335,13 +393,15 @@ function internalInvertIntegralLn(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.div(value, Decimal.div(value, Math.E).lambertw()));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateLn(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         return new Formula({
             inputs: [lhs.getIntegralFormula(stack)],
@@ -349,7 +409,8 @@ export function integrateLn(stack: SubstitutionStack, lhs: FormulaSource) {
             invert: internalInvertIntegralLn
         });
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertPow(value: DecimalSource, lhs: FormulaSource, rhs: FormulaSource) {
@@ -358,70 +419,81 @@ export function invertPow(value: DecimalSource, lhs: FormulaSource, rhs: Formula
     } else if (hasVariable(rhs)) {
         return rhs.invert(Decimal.ln(value).div(Decimal.ln(unrefFormulaSource(lhs))));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integratePow(stack: SubstitutionStack, lhs: FormulaSource, rhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         const pow = Formula.add(rhs, 1);
         return Formula.pow(x, pow).div(pow);
     } else if (hasVariable(rhs)) {
         if (!rhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = rhs.getIntegralFormula(stack);
         return Formula.pow(lhs, x).div(Formula.ln(lhs));
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertPow10(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.root(value, 10));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integratePow10(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.pow10(x).div(Formula.ln(10));
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertPowBase(value: DecimalSource, lhs: FormulaSource, rhs: FormulaSource) {
     if (hasVariable(lhs)) {
-        return lhs.invert(Decimal.ln(value).div(unrefFormulaSource(rhs)));
+        return lhs.invert(Decimal.ln(value).div(Decimal.ln(unrefFormulaSource(rhs))));
     } else if (hasVariable(rhs)) {
         return rhs.invert(Decimal.root(unrefFormulaSource(lhs), value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integratePowBase(stack: SubstitutionStack, lhs: FormulaSource, rhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.pow(rhs, x).div(Formula.ln(rhs));
     } else if (hasVariable(rhs)) {
         if (!rhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = rhs.getIntegralFormula(stack);
         const denominator = Formula.add(lhs, 1);
         return Formula.pow(x, denominator).div(denominator);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertRoot(value: DecimalSource, lhs: FormulaSource, rhs: FormulaSource) {
@@ -430,36 +502,42 @@ export function invertRoot(value: DecimalSource, lhs: FormulaSource, rhs: Formul
     } else if (hasVariable(rhs)) {
         return rhs.invert(Decimal.ln(unrefFormulaSource(lhs)).div(Decimal.ln(value)));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateRoot(stack: SubstitutionStack, lhs: FormulaSource, rhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.pow(x, Formula.recip(rhs).add(1)).times(rhs).div(Formula.add(rhs, 1));
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertExp(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.ln(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateExp(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.exp(x);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function tetrate(
@@ -481,7 +559,8 @@ export function invertTetrate(
         return base.invert(Decimal.ssqrt(value));
     }
     // Other params can't be inverted ATM
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function iteratedexp(
@@ -509,7 +588,8 @@ export function invertIteratedExp(
         );
     }
     // Other params can't be inverted ATM
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function iteratedLog(
@@ -533,7 +613,8 @@ export function invertSlog(value: DecimalSource, lhs: FormulaSource, rhs: Formul
         );
     }
     // Other params can't be inverted ATM
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function layeradd(value: DecimalSource, diff: DecimalSource, base: DecimalSource) {
@@ -556,21 +637,24 @@ export function invertLayeradd(
         );
     }
     // Other params can't be inverted ATM
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function invertLambertw(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.pow(Math.E, value).times(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function invertSsqrt(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.tetrate(value, 2));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function pentate(value: DecimalSource, height: DecimalSource, payload: DecimalSource) {
@@ -582,226 +666,262 @@ export function invertSin(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.asin(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateSin(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.cos(x).neg();
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertCos(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.acos(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateCos(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.sin(x);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertTan(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.atan(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateTan(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.cos(x).ln().neg();
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertAsin(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.sin(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateAsin(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.asin(x)
             .times(x)
             .add(Formula.sqrt(Formula.sub(1, Formula.pow(x, 2))));
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertAcos(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.cos(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateAcos(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.acos(x)
             .times(x)
             .sub(Formula.sqrt(Formula.sub(1, Formula.pow(x, 2))));
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertAtan(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.tan(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateAtan(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.atan(x)
             .times(x)
             .sub(Formula.ln(Formula.pow(x, 2).add(1)).div(2));
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertSinh(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.asinh(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateSinh(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.cosh(x);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertCosh(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.acosh(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateCosh(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.sinh(x);
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertTanh(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.atanh(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateTanh(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.cosh(x).ln();
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertAsinh(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.sinh(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateAsinh(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.asinh(x).times(x).sub(Formula.pow(x, 2).add(1).sqrt());
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertAcosh(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.cosh(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateAcosh(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.acosh(x)
             .times(x)
             .sub(Formula.add(x, 1).sqrt().times(Formula.sub(x, 1).sqrt()));
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function invertAtanh(value: DecimalSource, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         return lhs.invert(Decimal.tanh(value));
     }
-    throw new Error("Could not invert due to no input being a variable");
+    console.error("Could not invert due to no input being a variable");
+    return 0;
 }
 
 export function integrateAtanh(stack: SubstitutionStack, lhs: FormulaSource) {
     if (hasVariable(lhs)) {
         if (!lhs.isIntegrable()) {
-            throw new Error("Could not integrate due to variable not being integrable");
+            console.error("Could not integrate due to variable not being integrable");
+            return Formula.constant(0);
         }
         const x = lhs.getIntegralFormula(stack);
         return Formula.atanh(x)
             .times(x)
             .add(Formula.sub(1, Formula.pow(x, 2)).ln().div(2));
     }
-    throw new Error("Could not integrate due to no input being a variable");
+    console.error("Could not integrate due to no input being a variable");
+    return Formula.constant(0);
 }
 
 export function createPassthroughBinaryFormula(
diff --git a/src/game/layers.tsx b/src/game/layers.tsx
index 6294592..bbb6079 100644
--- a/src/game/layers.tsx
+++ b/src/game/layers.tsx
@@ -225,7 +225,9 @@ export function createLayer<T extends LayerOptions>(
             addingLayers[addingLayers.length - 1] == null ||
             addingLayers[addingLayers.length - 1] !== id
         ) {
-            throw `Adding layers stack in invalid state. This should not happen\nStack: ${addingLayers}\nTrying to pop ${layer.id}`;
+            throw new Error(
+                `Adding layers stack in invalid state. This should not happen\nStack: ${addingLayers}\nTrying to pop ${layer.id}`
+            );
         }
         addingLayers.pop();
 
diff --git a/src/game/modifiers.tsx b/src/game/modifiers.tsx
index cceacd8..b65e7fc 100644
--- a/src/game/modifiers.tsx
+++ b/src/game/modifiers.tsx
@@ -41,11 +41,11 @@ export interface Modifier {
 /**
  * Utility type used to narrow down a modifier type that will have a description and/or enabled property based on optional parameters, T and S (respectively).
  */
-export type ModifierFromOptionalParams<T, S> = T extends undefined
-    ? S extends undefined
+export type ModifierFromOptionalParams<T, S> = undefined extends T
+    ? undefined extends S
         ? Omit<WithRequired<Modifier, "invert" | "getFormula">, "description" | "enabled">
         : Omit<WithRequired<Modifier, "invert" | "enabled" | "getFormula">, "description">
-    : S extends undefined
+    : undefined extends S
     ? Omit<WithRequired<Modifier, "invert" | "description" | "getFormula">, "enabled">
     : WithRequired<Modifier, "invert" | "enabled" | "description" | "getFormula">;
 
diff --git a/src/game/persistence.ts b/src/game/persistence.ts
index 712f989..e760411 100644
--- a/src/game/persistence.ts
+++ b/src/game/persistence.ts
@@ -9,6 +9,7 @@ import type { Ref, WritableComputedRef } from "vue";
 import { computed, isReactive, isRef, ref } from "vue";
 import player from "./player";
 import state from "./state";
+import Formula from "./formulas/formulas";
 
 /**
  * A symbol used in {@link Persistent} objects.
@@ -115,12 +116,7 @@ function checkNaNAndWrite<T extends State>(persistent: Persistent<T>, value: T)
             state.NaNPath = persistent[SaveDataPath];
             state.NaNPersistent = persistent as Persistent<DecimalSource>;
         }
-        console.error(
-            `Attempted to save NaN value to`,
-            persistent[SaveDataPath]?.join("."),
-            persistent
-        );
-        throw new Error("Attempted to set NaN value. See above for details");
+        console.error(`Attempted to save NaN value to ${persistent[SaveDataPath]?.join(".")}`);
     }
     persistent[PersistentState].value = value;
 }
@@ -291,8 +287,8 @@ globalBus.on("addLayer", (layer: GenericLayer, saveData: Record<string, unknown>
                                 "."
                             )}\` when it's already present at \`${value[SaveDataPath].join(
                                 "."
-                            )}\`. This can cause unexpected behavior when loading saves between updates.`,
-                            value
+                            )}\`.`,
+                            "This can cause unexpected behavior when loading saves between updates."
                         );
                     }
                     value[SaveDataPath] = newPath;
@@ -325,6 +321,7 @@ globalBus.on("addLayer", (layer: GenericLayer, saveData: Record<string, unknown>
                     }
                 } else if (
                     !(value instanceof Decimal) &&
+                    !(value instanceof Formula) &&
                     !isRef(value) &&
                     // eslint-disable-next-line @typescript-eslint/no-explicit-any
                     !features.includes(value as { type: typeof Symbol })
@@ -366,9 +363,9 @@ globalBus.on("addLayer", (layer: GenericLayer, saveData: Record<string, unknown>
             return;
         }
         console.error(
-            `Created persistent ref in ${layer.id} without registering it to the layer! Make sure to include everything persistent in the returned object`,
-            persistent,
-            "\nCreated at:\n" + persistent[StackTrace]
+            `Created persistent ref in ${layer.id} without registering it to the layer!`,
+            "Make sure to include everything persistent in the returned object.\n\nCreated at:\n" +
+                persistent[StackTrace]
         );
     });
     persistentRefs[layer.id].clear();
diff --git a/src/game/requirements.tsx b/src/game/requirements.tsx
index 0b00192..ea82a64 100644
--- a/src/game/requirements.tsx
+++ b/src/game/requirements.tsx
@@ -20,7 +20,7 @@ import { createLazyProxy } from "util/proxies";
 import { joinJSX, renderJSX } from "util/vue";
 import { computed, unref } from "vue";
 import Formula, { calculateCost, calculateMaxAffordable } from "./formulas/formulas";
-import type { GenericFormula, InvertibleFormula } from "./formulas/types";
+import type { GenericFormula } from "./formulas/types";
 import { DefaultValue, Persistent } from "./persistence";
 
 /**
@@ -86,7 +86,15 @@ export interface CostRequirementOptions {
      * When calculating multiple levels to be handled at once, whether it should consider resources used for each level as spent. Setting this to false causes calculations to be faster with larger numbers and supports more math functions.
      * @see {Formula}
      */
-    spendResources?: Computable<boolean>;
+    cumulativeCost?: Computable<boolean>;
+    /**
+     * Upper limit on levels that can be performed at once. Defaults to 1.
+     */
+    maxBulkAmount?: Computable<DecimalSource>;
+    /**
+     * When calculating requirement for multiple levels, how many should be directly summed for increase accuracy. High numbers can cause lag. Defaults to 10 if cumulative cost, 0 otherwise.
+     */
+    directSum?: Computable<number>;
     /**
      * Pass-through to {@link Requirement.pay}. May be required for maximizing support.
      * @see {@link cost} for restrictions on maximizing support.
@@ -100,7 +108,7 @@ export type CostRequirement = Replace<
         cost: ProcessedComputable<DecimalSource> | GenericFormula;
         visibility: ProcessedComputable<Visibility.Visible | Visibility.None | boolean>;
         requiresPay: ProcessedComputable<boolean>;
-        spendResources: ProcessedComputable<boolean>;
+        cumulativeCost: ProcessedComputable<boolean>;
         canMaximize: ProcessedComputable<boolean>;
     }
 >;
@@ -126,7 +134,12 @@ export function createCostRequirement<T extends CostRequirementOptions>(
                 {displayResource(
                     req.resource,
                     req.cost instanceof Formula
-                        ? calculateCost(req.cost, amount ?? 1, unref(req.spendResources) as boolean)
+                        ? calculateCost(
+                              req.cost,
+                              amount ?? 1,
+                              unref(req.cumulativeCost) as boolean,
+                              unref(req.directSum) as number
+                          )
                         : unref(req.cost as ProcessedComputable<DecimalSource>)
                 )}{" "}
                 {req.resource.displayName}
@@ -138,7 +151,12 @@ export function createCostRequirement<T extends CostRequirementOptions>(
                 {displayResource(
                     req.resource,
                     req.cost instanceof Formula
-                        ? calculateCost(req.cost, amount ?? 1, unref(req.spendResources) as boolean)
+                        ? calculateCost(
+                              req.cost,
+                              amount ?? 1,
+                              unref(req.cumulativeCost) as boolean,
+                              unref(req.directSum) as number
+                          )
                         : unref(req.cost as ProcessedComputable<DecimalSource>)
                 )}{" "}
                 {req.resource.displayName}
@@ -150,54 +168,62 @@ export function createCostRequirement<T extends CostRequirementOptions>(
         processComputable(req as T, "cost");
         processComputable(req as T, "requiresPay");
         setDefault(req, "requiresPay", true);
-        processComputable(req as T, "spendResources");
-        setDefault(req, "spendResources", true);
+        processComputable(req as T, "cumulativeCost");
+        setDefault(req, "cumulativeCost", true);
+        processComputable(req as T, "maxBulkAmount");
+        setDefault(req, "maxBulkAmount", 1);
+        processComputable(req as T, "directSum");
         setDefault(req, "pay", function (amount?: DecimalSource) {
             const cost =
                 req.cost instanceof Formula
-                    ? calculateCost(req.cost, amount ?? 1, unref(req.spendResources) as boolean)
+                    ? calculateCost(
+                          req.cost,
+                          amount ?? 1,
+                          unref(req.cumulativeCost) as boolean,
+                          unref(req.directSum) as number
+                      )
                     : unref(req.cost as ProcessedComputable<DecimalSource>);
             req.resource.value = Decimal.sub(req.resource.value, cost).max(0);
         });
 
-        req.canMaximize = computed(
-            () =>
-                req.cost instanceof Formula &&
-                req.cost.isInvertible() &&
-                (unref(req.spendResources) === false || req.cost.isIntegrable())
-        );
+        req.canMaximize = computed(() => {
+            if (!(req.cost instanceof Formula)) {
+                return false;
+            }
+            const maxBulkAmount = unref(req.maxBulkAmount as ProcessedComputable<DecimalSource>);
+            if (Decimal.lte(maxBulkAmount, 1)) {
+                return false;
+            }
+            const cumulativeCost = unref(req.cumulativeCost as ProcessedComputable<boolean>);
+            const directSum =
+                unref(req.directSum as ProcessedComputable<number>) ?? (cumulativeCost ? 10 : 0);
+            if (Decimal.lte(maxBulkAmount, directSum)) {
+                return true;
+            }
+            if (!req.cost.isInvertible()) {
+                return false;
+            }
+            if (cumulativeCost === true && !req.cost.isIntegrable()) {
+                return false;
+            }
+            return true;
+        });
 
-        if (req.cost instanceof Formula && req.cost.isInvertible()) {
-            const maxAffordable = calculateMaxAffordable(
+        if (req.cost instanceof Formula) {
+            req.requirementMet = calculateMaxAffordable(
                 req.cost,
                 req.resource,
-                unref(req.spendResources) as boolean
+                req.cumulativeCost ?? true,
+                req.directSum,
+                req.maxBulkAmount
             );
-            req.requirementMet = computed(() => {
-                if (unref(req.canMaximize)) {
-                    return maxAffordable.value;
-                } else {
-                    if (req.cost instanceof Formula) {
-                        return Decimal.gte(req.resource.value, req.cost.evaluate());
-                    } else {
-                        return Decimal.gte(
-                            req.resource.value,
-                            unref(req.cost as ProcessedComputable<DecimalSource>)
-                        );
-                    }
-                }
-            });
         } else {
-            req.requirementMet = computed(() => {
-                if (req.cost instanceof Formula) {
-                    return Decimal.gte(req.resource.value, req.cost.evaluate());
-                } else {
-                    return Decimal.gte(
-                        req.resource.value,
-                        unref(req.cost as ProcessedComputable<DecimalSource>)
-                    );
-                }
-            });
+            req.requirementMet = computed(() =>
+                Decimal.gte(
+                    req.resource.value,
+                    unref(req.cost as ProcessedComputable<DecimalSource>)
+                ) ? 1 : 0
+            );
         }
 
         return req as CostRequirement;
@@ -328,7 +354,7 @@ export function payByDivision(this: CostRequirement, amount?: DecimalSource) {
             ? calculateCost(
                   this.cost,
                   amount ?? 1,
-                  unref(this.spendResources as ProcessedComputable<boolean> | undefined) ?? true
+                  unref(this.cumulativeCost as ProcessedComputable<boolean> | undefined) ?? true
               )
             : unref(this.cost as ProcessedComputable<DecimalSource>);
     this.resource.value = Decimal.div(this.resource.value, cost);
diff --git a/src/game/state.ts b/src/game/state.ts
index db71c7b..9e672c3 100644
--- a/src/game/state.ts
+++ b/src/game/state.ts
@@ -1,5 +1,5 @@
 import type { DecimalSource } from "util/bignum";
-import { shallowReactive } from "vue";
+import { reactive, shallowReactive } from "vue";
 import type { Persistent } from "./persistence";
 
 /** An object of global data that is not persistent. */
@@ -12,6 +12,8 @@ export interface Transient {
     NaNPath?: string[];
     /** The ref that was being set to NaN. */
     NaNPersistent?: Persistent<DecimalSource>;
+    /** List of errors that have occurred, to show the user. */
+    errors: Error[];
 }
 
 declare global {
@@ -24,5 +26,6 @@ declare global {
 export default window.state = shallowReactive<Transient>({
     lastTenTicks: [],
     hasNaN: false,
-    NaNPath: []
+    NaNPath: [],
+    errors: reactive([])
 });
diff --git a/src/main.ts b/src/main.ts
index 38c9ac3..e416fa5 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -2,6 +2,7 @@ import "@fontsource/material-icons";
 import App from "App.vue";
 import projInfo from "data/projInfo.json";
 import "game/notifications";
+import state from "game/state";
 import { load } from "util/save";
 import { useRegisterSW } from "virtual:pwa-register/vue";
 import type { App as VueApp } from "vue";
@@ -23,11 +24,32 @@ declare global {
     }
 }
 
+const error = console.error;
+console.error = function (...args) {
+    if (import.meta.env.DEV) {
+        state.errors.push(new Error(args[0], { cause: args[1] }));
+    }
+    error(...args);
+};
+
+window.onerror = function (event, source, lineno, colno, err) {
+    state.errors.push(err instanceof Error ? err : new Error(JSON.stringify(err)));
+    error(err);
+    return true;
+};
+window.onunhandledrejection = function (event) {
+    state.errors.push(
+        event.reason instanceof Error ? event.reason : new Error(JSON.stringify(event.reason))
+    );
+    error(event.reason);
+};
+
 document.title = projInfo.title;
 window.projInfo = projInfo;
 if (projInfo.id === "") {
-    throw new Error(
-        "Project ID is empty! Please select a unique ID for this project in /src/data/projInfo.json"
+    console.error(
+        "Project ID is empty!",
+        "Please select a unique ID for this project in /src/data/projInfo.json"
     );
 }
 
@@ -43,6 +65,9 @@ requestAnimationFrame(async () => {
 
     // Create Vue
     const vue = (window.vue = createApp(App));
+    vue.config.errorHandler = function (err, instance, info) {
+        console.error(err, info, instance);
+    };
     globalBus.emit("setupVue", vue);
     vue.mount("#app");
 
diff --git a/src/util/common.ts b/src/util/common.ts
index d7560dd..dbbe233 100644
--- a/src/util/common.ts
+++ b/src/util/common.ts
@@ -12,6 +12,11 @@ export function camelToTitle(camel: string): string {
     return title;
 }
 
+export function camelToKebab(camel: string) {
+    // Split off first character so function works on upper camel (pascal) case
+    return (camel[0] + camel.slice(1).replace(/[A-Z]/g, c => `-${c}`)).toLowerCase();
+}
+
 export function isFunction<T, S extends ReadonlyArray<unknown>, R>(
     functionOrValue: ((...args: S) => T) | R
 ): functionOrValue is (...args: S) => T {
diff --git a/src/util/proxies.ts b/src/util/proxies.ts
index 6e7a6f1..ed5d4ac 100644
--- a/src/util/proxies.ts
+++ b/src/util/proxies.ts
@@ -36,8 +36,13 @@ export function createLazyProxy<T extends object, S extends T>(
 ): T {
     const obj: S & Partial<T> = baseObject;
     let calculated = false;
+    let calculating = false;
     function calculateObj(): T {
         if (!calculated) {
+            if (calculating) {
+                console.error("Cyclical dependency detected. Cannot evaluate lazy proxy.");
+            }
+            calculating = true;
             Object.assign(obj, objectFunc.call(obj, obj));
             calculated = true;
         }
diff --git a/src/util/vue.tsx b/src/util/vue.tsx
index a3897a5..3ba5f06 100644
--- a/src/util/vue.tsx
+++ b/src/util/vue.tsx
@@ -21,6 +21,7 @@ import {
     unref,
     watchEffect
 } from "vue";
+import { camelToKebab } from "./common";
 
 export function coerceComponent(
     component: CoercableComponent,
@@ -241,3 +242,10 @@ export function trackHover(element: VueFeature): Ref<boolean> {
 
     return isHovered;
 }
+
+export function kebabifyObject(object: Record<string, unknown>) {
+    return Object.keys(object).reduce((acc, curr) => {
+        acc[camelToKebab(curr)] = object[curr];
+        return acc;
+    }, {} as Record<string, unknown>);
+}
diff --git a/tests/game/formulas.test.ts b/tests/game/formulas.test.ts
index db020a5..98bb82d 100644
--- a/tests/game/formulas.test.ts
+++ b/tests/game/formulas.test.ts
@@ -13,9 +13,13 @@ import { InvertibleIntegralFormula } from "game/formulas/types";
 
 type FormulaFunctions = keyof GenericFormula & keyof typeof Formula & keyof typeof Decimal;
 
-const testValues = [-1, "0", Decimal.dOne] as const;
+const testValues = [-2, "0", new Decimal(10.5)] as const;
 
 const invertibleZeroParamFunctionNames = [
+    "round",
+    "floor",
+    "ceil",
+    "trunc",
     "neg",
     "recip",
     "log10",
@@ -48,10 +52,6 @@ const invertibleZeroParamFunctionNames = [
 const nonInvertibleZeroParamFunctionNames = [
     "abs",
     "sign",
-    "round",
-    "floor",
-    "ceil",
-    "trunc",
     "pLog10",
     "absLog10",
     "factorial",
@@ -85,6 +85,10 @@ const integrableZeroParamFunctionNames = [
 ] as const;
 const nonIntegrableZeroParamFunctionNames = [
     ...nonInvertibleZeroParamFunctionNames,
+    "round",
+    "floor",
+    "ceil",
+    "trunc",
     "lambertw",
     "ssqrt"
 ] as const;
@@ -151,7 +155,7 @@ describe("Formula Equality Checking", () => {
     describe("Formula aliases", () => {
         function testAliases<T extends FormulaFunctions>(
             aliases: T[],
-            args: Parameters<(typeof Formula)[T]>
+            args: Parameters<typeof Formula[T]>
         ) {
             describe(aliases[0], () => {
                 let formula: GenericFormula;
@@ -227,14 +231,15 @@ describe("Creating Formulas", () => {
                     expect(formula.evaluate()).compare_tolerance(expectedValue));
                 // eslint-disable-next-line @typescript-eslint/ban-ts-comment
                 /* @ts-ignore */
-                test("Invert throws", () => expect(() => formula.invert(25)).toThrow());
-                // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-                /* @ts-ignore */
-                test("Integrate throws", () => expect(() => formula.evaluateIntegral()).toThrow());
-                test("Invert integral throws", () =>
+                test("Invert errors", () => expect(() => formula.invert(25)).toLogError());
+                test("Integrate errors", () =>
+                    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+                    /* @ts-ignore */
+                    expect(() => formula.evaluateIntegral()).toLogError());
+                test("Invert integral errors", () =>
                     // eslint-disable-next-line @typescript-eslint/ban-ts-comment
                     /* @ts-ignore */
-                    expect(() => formula.invertIntegral(25)).toThrow());
+                    expect(() => formula.invertIntegral(25)).toLogError());
             });
         }
         testConstant("number", () => Formula.constant(10));
@@ -245,7 +250,7 @@ describe("Creating Formulas", () => {
 
     function checkFormula<T extends FormulaFunctions>(
         functionName: T,
-        args: Readonly<Parameters<(typeof Formula)[T]>>
+        args: Readonly<Parameters<typeof Formula[T]>>
     ) {
         let formula: GenericFormula;
         beforeAll(() => {
@@ -256,10 +261,10 @@ describe("Creating Formulas", () => {
         // None of these formulas have variables, so they should all behave the same
         test("Is not marked as having a variable", () => expect(formula.hasVariable()).toBe(false));
         test("Is not invertible", () => expect(formula.isInvertible()).toBe(false));
-        test(`Formula throws if trying to invert`, () =>
+        test(`Formula errors if trying to invert`, () =>
             // eslint-disable-next-line @typescript-eslint/ban-ts-comment
             /* @ts-ignore */
-            expect(() => formula.invert(10)).toThrow());
+            expect(() => formula.invert(10)).toLogError());
         test("Is not integrable", () => expect(formula.isIntegrable()).toBe(false));
         test("Has a non-invertible integral", () =>
             expect(formula.isIntegralInvertible()).toBe(false));
@@ -269,7 +274,7 @@ describe("Creating Formulas", () => {
     // It's a lot of tests, but I'd rather be exhaustive
     function testFormulaCall<T extends FormulaFunctions>(
         functionName: T,
-        args: Readonly<Parameters<(typeof Formula)[T]>>
+        args: Readonly<Parameters<typeof Formula[T]>>
     ) {
         if ((functionName === "slog" || functionName === "layeradd") && args[0] === -1) {
             // These cases in particular take a long time, so skip them
@@ -487,14 +492,21 @@ describe("Inverting", () => {
     });
 
     test("Inverting nested formulas", () => {
-        const formula = Formula.add(variable, constant).times(constant);
+        const formula = Formula.add(variable, constant).times(constant).floor();
         expect(formula.invert(100)).compare_tolerance(0);
     });
 
-    test("Inverting with non-invertible sections", () => {
-        const formula = Formula.add(variable, constant.ceil());
-        expect(formula.isInvertible()).toBe(true);
-        expect(formula.invert(10)).compare_tolerance(0);
+    describe("Inverting with non-invertible sections", () => {
+        test("Non-invertible constant", () => {
+            const formula = Formula.add(variable, constant.sign());
+            expect(formula.isInvertible()).toBe(true);
+            expect(() => formula.invert(10)).not.toLogError();
+        });
+        test("Non-invertible variable", () => {
+            const formula = Formula.add(variable.sign(), constant);
+            expect(formula.isInvertible()).toBe(false);
+            expect(() => formula.invert(10)).toLogError();
+        });
     });
 });
 
@@ -617,7 +629,20 @@ describe("Integrating", () => {
 
     test("Integrating nested complex formulas", () => {
         const formula = Formula.pow(1.05, variable).times(100).pow(0.5);
-        expect(() => formula.evaluateIntegral()).toThrow();
+        expect(() => formula.evaluateIntegral()).toLogError();
+    });
+
+    describe("Integrating with non-integrable sections", () => {
+        test("Non-integrable constant", () => {
+            const formula = Formula.add(variable, constant.ceil());
+            expect(formula.isIntegrable()).toBe(true);
+            expect(() => formula.evaluateIntegral()).not.toLogError();
+        });
+        test("Non-integrable variable", () => {
+            const formula = Formula.add(variable.ceil(), constant);
+            expect(formula.isIntegrable()).toBe(false);
+            expect(() => formula.evaluateIntegral()).toLogError();
+        });
     });
 });
 
@@ -637,7 +662,7 @@ describe("Inverting integrals", () => {
     describe("Invertible Integral functions marked as such", () => {
         function checkFormula(formula: InvertibleIntegralFormula) {
             expect(formula.isIntegralInvertible()).toBe(true);
-            expect(() => formula.invertIntegral(10)).to.not.throw();
+            expect(() => formula.invertIntegral(10)).not.toLogError();
         }
         invertibleIntegralZeroPramFunctionNames.forEach(name => {
             describe(name, () => {
@@ -656,7 +681,7 @@ describe("Inverting integrals", () => {
                 test(`${name}(var, var) is marked as not having an invertible integral`, () => {
                     const formula = Formula[name](variable, variable);
                     expect(formula.isIntegralInvertible()).toBe(false);
-                    expect(() => formula.invertIntegral(10)).to.throw();
+                    expect(() => formula.invertIntegral(10)).toLogError();
                 });
             });
         });
@@ -712,7 +737,7 @@ describe("Inverting integrals", () => {
 
     test("Inverting integral of nested complex formulas", () => {
         const formula = Formula.pow(1.05, variable).times(100).pow(0.5);
-        expect(() => formula.invertIntegral(100)).toThrow();
+        expect(() => formula.invertIntegral(100)).toLogError();
     });
 });
 
@@ -745,7 +770,7 @@ describe("Step-wise", () => {
         );
         expect(() =>
             Formula.step(constant, 10, value => Formula.add(value, 10)).evaluateIntegral()
-        ).toThrow();
+        ).toLogError();
     });
 
     test("Formula never marked as having an invertible integral", () => {
@@ -754,7 +779,7 @@ describe("Step-wise", () => {
         ).toBe(false);
         expect(() =>
             Formula.step(constant, 10, value => Formula.add(value, 10)).invertIntegral(10)
-        ).toThrow();
+        ).toLogError();
     });
 
     test("Formula modifiers with variables mark formula as non-invertible", () => {
@@ -846,7 +871,7 @@ describe("Conditionals", () => {
         );
         expect(() =>
             Formula.if(constant, true, value => Formula.add(value, 10)).evaluateIntegral()
-        ).toThrow();
+        ).toLogError();
     });
 
     test("Formula never marked as having an invertible integral", () => {
@@ -855,7 +880,7 @@ describe("Conditionals", () => {
         ).toBe(false);
         expect(() =>
             Formula.if(constant, true, value => Formula.add(value, 10)).invertIntegral(10)
-        ).toThrow();
+        ).toLogError();
     });
 
     test("Formula modifiers with variables mark formula as non-invertible", () => {
@@ -956,7 +981,7 @@ describe("Custom Formulas", () => {
                     evaluate: () => 6,
                     invert: value => value
                 }).invert(10)
-            ).toThrow());
+            ).toLogError());
         test("One input inverts correctly", () =>
             expect(
                 new Formula({
@@ -983,7 +1008,7 @@ describe("Custom Formulas", () => {
                     evaluate: () => 0,
                     integrate: stack => variable
                 }).evaluateIntegral()
-            ).toThrow());
+            ).toLogError());
         test("One input integrates correctly", () =>
             expect(
                 new Formula({
@@ -1010,7 +1035,7 @@ describe("Custom Formulas", () => {
                     evaluate: () => 0,
                     integrate: stack => variable
                 }).invertIntegral(20)
-            ).toThrow());
+            ).toLogError());
         test("One input inverts integral correctly", () =>
             expect(
                 new Formula({
@@ -1053,12 +1078,19 @@ describe("Buy Max", () => {
     beforeAll(() => {
         resource = createResource(ref(100000));
     });
-    describe("Without spending", () => {
-        test("Throws on formula with non-invertible integral", () => {
-            // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-            /* @ts-ignore */
-            const maxAffordable = calculateMaxAffordable(Formula.neg(10), resource, false);
-            expect(() => maxAffordable.value).toThrow();
+    describe("Without cumulative cost", () => {
+        test("Errors on calculating max affordable of non-invertible formula", () => {
+            const purchases = ref(1);
+            const variable = Formula.variable(purchases);
+            const formula = Formula.abs(variable);
+            const maxAffordable = calculateMaxAffordable(formula, resource, false);
+            expect(() => maxAffordable.value).toLogError();
+        });
+        test("Errors on calculating cost of non-invertible formula", () => {
+            const purchases = ref(1);
+            const variable = Formula.variable(purchases);
+            const formula = Formula.abs(variable);
+            expect(() => calculateCost(formula, 5, false, 0)).toLogError();
         });
         test("Calculates max affordable and cost correctly", () => {
             const variable = Formula.variable(0);
@@ -1069,11 +1101,32 @@ describe("Buy Max", () => {
                 Decimal.pow(1.05, 141).times(100)
             );
         });
+        test("Calculates max affordable and cost correctly with direct sum", () => {
+            const variable = Formula.variable(0);
+            const formula = Formula.pow(1.05, variable).times(100);
+            const maxAffordable = calculateMaxAffordable(formula, resource, false, 4);
+            expect(maxAffordable.value).compare_tolerance(141 - 4);
+
+            const actualCost = new Array(4)
+                .fill(null)
+                .reduce((acc, _, i) => acc.add(formula.evaluate(133 + i)), new Decimal(0));
+            const calculatedCost = calculateCost(formula, maxAffordable.value, false, 4);
+            expect(calculatedCost).compare_tolerance(actualCost);
+        });
     });
-    describe("With spending", () => {
-        test("Throws on non-invertible formula", () => {
-            const maxAffordable = calculateMaxAffordable(Formula.abs(10), resource);
-            expect(() => maxAffordable.value).toThrow();
+    describe("With cumulative cost", () => {
+        test("Errors on calculating max affordable of non-invertible formula", () => {
+            const purchases = ref(1);
+            const variable = Formula.variable(purchases);
+            const formula = Formula.abs(variable);
+            const maxAffordable = calculateMaxAffordable(formula, resource, true);
+            expect(() => maxAffordable.value).toLogError();
+        });
+        test("Errors on calculating cost of non-invertible formula", () => {
+            const purchases = ref(1);
+            const variable = Formula.variable(purchases);
+            const formula = Formula.abs(variable);
+            expect(() => calculateCost(formula, 5, true, 0)).toLogError();
         });
         test("Estimates max affordable and cost correctly with 0 purchases", () => {
             const purchases = ref(0);
@@ -1131,7 +1184,7 @@ describe("Buy Max", () => {
                 Decimal.sub(actualCost, calculatedCost).abs().div(actualCost).toNumber()
             ).toBeLessThan(0.1);
         });
-        test("Estimates max affordable and cost more accurately with summing last purchases", () => {
+        test("Estimates max affordable and cost more accurately with direct sum", () => {
             const purchases = ref(1);
             const variable = Formula.variable(purchases);
             const formula = Formula.pow(1.05, variable).times(100);
@@ -1158,7 +1211,7 @@ describe("Buy Max", () => {
                 Decimal.sub(actualCost, calculatedCost).abs().div(actualCost).toNumber()
             ).toBeLessThan(0.02);
         });
-        test("Handles summing purchases when making few purchases", () => {
+        test("Handles direct sum when making few purchases", () => {
             const purchases = ref(90);
             const variable = Formula.variable(purchases);
             const formula = Formula.pow(1.05, variable).times(100);
@@ -1186,7 +1239,7 @@ describe("Buy Max", () => {
             // Since we're summing all the purchases this should be equivalent
             expect(calculatedCost).compare_tolerance(actualCost);
         });
-        test("Handles summing purchases when making very few purchases", () => {
+        test("Handles direct sum when making very few purchases", () => {
             const purchases = ref(0);
             const variable = Formula.variable(purchases);
             const formula = variable.add(1);
@@ -1200,11 +1253,11 @@ describe("Buy Max", () => {
                     (acc, _, i) => acc.add(formula.evaluate(i + purchases.value)),
                     new Decimal(0)
                 );
-            const calculatedCost = calculateCost(formula, maxAffordable.value, true);
+            const calculatedCost = calculateCost(formula, maxAffordable.value);
             // Since we're summing all the purchases this should be equivalent
             expect(calculatedCost).compare_tolerance(actualCost);
         });
-        test("Handles summing purchases when over e308 purchases", () => {
+        test("Handles direct sum when over e308 purchases", () => {
             resource.value = "1ee308";
             const purchases = ref(0);
             const variable = Formula.variable(purchases);
@@ -1215,5 +1268,10 @@ describe("Buy Max", () => {
             expect(Decimal.isFinite(calculatedCost)).toBe(true);
             resource.value = 100000;
         });
+        test("Handles direct sum of non-integrable formula", () => {
+            const purchases = ref(0);
+            const formula = Formula.variable(purchases).abs();
+            expect(() => calculateCost(formula, 10)).not.toLogError();
+        });
     });
 });
diff --git a/tests/game/requirements.test.ts b/tests/game/requirements.test.ts
index 2222276..8ee3c43 100644
--- a/tests/game/requirements.test.ts
+++ b/tests/game/requirements.test.ts
@@ -11,6 +11,7 @@ import {
     Requirement,
     requirementsMet
 } from "game/requirements";
+import Decimal from "util/bignum";
 import { beforeAll, describe, expect, test } from "vitest";
 import { isRef, ref, unref } from "vue";
 import "../utils";
@@ -26,8 +27,7 @@ describe("Creating cost requirement", () => {
         beforeAll(() => {
             requirement = createCostRequirement(() => ({
                 resource,
-                cost: 10,
-                spendResources: false
+                cost: 10
             }));
         });
 
@@ -44,7 +44,7 @@ describe("Creating cost requirement", () => {
         });
         test("is visible", () => expect(requirement.visibility).toBe(Visibility.Visible));
         test("requires pay", () => expect(requirement.requiresPay).toBe(true));
-        test("does not spend resources", () => expect(requirement.spendResources).toBe(false));
+        test("does not spend resources", () => expect(requirement.cumulativeCost).toBe(true));
         test("cannot maximize", () => expect(unref(requirement.canMaximize)).toBe(false));
     });
 
@@ -56,8 +56,9 @@ describe("Creating cost requirement", () => {
                 cost: Formula.variable(resource).times(10),
                 visibility: Visibility.None,
                 requiresPay: false,
-                maximize: true,
-                spendResources: true,
+                cumulativeCost: false,
+                maxBulkAmount: Decimal.dInf,
+                directSum: 5,
                 // eslint-disable-next-line @typescript-eslint/no-empty-function
                 pay() {}
             }));
@@ -69,30 +70,43 @@ describe("Creating cost requirement", () => {
             requirement.pay.length === 1);
         test("is not visible", () => expect(requirement.visibility).toBe(Visibility.None));
         test("does not require pay", () => expect(requirement.requiresPay).toBe(false));
-        test("spends resources", () => expect(requirement.spendResources).toBe(true));
+        test("spends resources", () => expect(requirement.cumulativeCost).toBe(false));
         test("can maximize", () => expect(unref(requirement.canMaximize)).toBe(true));
+        test("maxBulkAmount is set", () =>
+            expect(unref(requirement.maxBulkAmount)).compare_tolerance(Decimal.dInf));
+        test("directSum is set", () => expect(unref(requirement.directSum)).toBe(5));
     });
 
     test("Requirement met when meeting the cost", () => {
         const requirement = createCostRequirement(() => ({
             resource,
             cost: 10,
-            spendResources: false
+            cumulativeCost: false
         }));
-        expect(unref(requirement.requirementMet)).toBe(true);
+        expect(unref(requirement.requirementMet)).toBe(1);
     });
 
     test("Requirement not met when not meeting the cost", () => {
         const requirement = createCostRequirement(() => ({
             resource,
             cost: 100,
-            spendResources: false
+            cumulativeCost: false
         }));
-        expect(unref(requirement.requirementMet)).toBe(false);
+        expect(unref(requirement.requirementMet)).toBe(0);
     });
 
     describe("canMaximize works correctly", () => {
         test("Cost function cannot maximize", () =>
+            expect(
+                unref(
+                    createCostRequirement(() => ({
+                        resource,
+                        cost: () => 10,
+                        maxBulkAmount: Decimal.dInf
+                    })).canMaximize
+                )
+            ).toBe(false));
+        test("Integrable formula cannot maximize if maxBulkAmount is left at 1", () =>
             expect(
                 unref(
                     createCostRequirement(() => ({
@@ -101,82 +115,104 @@ describe("Creating cost requirement", () => {
                     })).canMaximize
                 )
             ).toBe(false));
-        test("Non-invertible formula cannot maximize", () =>
+        test("Non-invertible formula cannot maximize when max bulk amount is above direct sum", () =>
             expect(
                 unref(
                     createCostRequirement(() => ({
                         resource,
-                        cost: Formula.variable(resource).abs()
+                        cost: Formula.variable(resource).abs(),
+                        maxBulkAmount: Decimal.dInf
                     })).canMaximize
                 )
             ).toBe(false));
-        test("Invertible formula can maximize if spendResources is false", () =>
+        test("Non-invertible formula can maximize when max bulk amount is lte direct sum", () =>
+            expect(
+                unref(
+                    createCostRequirement(() => ({
+                        resource,
+                        cost: Formula.variable(resource).abs(),
+                        maxBulkAmount: 20,
+                        directSum: 20
+                    })).canMaximize
+                )
+            ).toBe(true));
+        test("Invertible formula can maximize if cumulativeCost is false", () =>
             expect(
                 unref(
                     createCostRequirement(() => ({
                         resource,
                         cost: Formula.variable(resource).lambertw(),
-                        spendResources: false
+                        cumulativeCost: false,
+                        maxBulkAmount: Decimal.dInf
                     })).canMaximize
                 )
             ).toBe(true));
-        test("Invertible formula cannot maximize if spendResources is true", () =>
+        test("Invertible formula cannot maximize if cumulativeCost is true", () =>
             expect(
                 unref(
                     createCostRequirement(() => ({
                         resource,
                         cost: Formula.variable(resource).lambertw(),
-                        spendResources: true
+                        cumulativeCost: true,
+                        maxBulkAmount: Decimal.dInf
                     })).canMaximize
                 )
             ).toBe(false));
-        test("Integrable formula can maximize if spendResources is false", () =>
+        test("Integrable formula can maximize if cumulativeCost is false", () =>
             expect(
                 unref(
                     createCostRequirement(() => ({
                         resource,
                         cost: Formula.variable(resource).pow(2),
-                        spendResources: false
+                        cumulativeCost: false,
+                        maxBulkAmount: Decimal.dInf
                     })).canMaximize
                 )
             ).toBe(true));
-        test("Integrable formula can maximize if spendResources is true", () =>
+        test("Integrable formula can maximize if cumulativeCost is true", () =>
             expect(
                 unref(
                     createCostRequirement(() => ({
                         resource,
                         cost: Formula.variable(resource).pow(2),
-                        spendResources: true
+                        cumulativeCost: true,
+                        maxBulkAmount: Decimal.dInf
                     })).canMaximize
                 )
             ).toBe(true));
     });
-});
-
-describe("Creating visibility requirement", () => {
-    test("Requirement met when visible", () => {
-        const requirement = createVisibilityRequirement({ visibility: Visibility.Visible });
-        expect(unref(requirement.requirementMet)).toBe(true);
-    });
 
-    test("Requirement not met when not visible", () => {
-        let requirement = createVisibilityRequirement({ visibility: Visibility.None });
-        expect(unref(requirement.requirementMet)).toBe(false);
-        requirement = createVisibilityRequirement({ visibility: false });
-        expect(unref(requirement.requirementMet)).toBe(false);
-    });
+    test("Requirements met capped by maxBulkAmount", () =>
+        expect(
+            unref(
+                createCostRequirement(() => ({
+                    resource,
+                    cost: Formula.variable(resource).times(0.0001),
+                    maxBulkAmount: 10,
+                    cumulativeCost: false
+                })).requirementMet
+            )
+        ).compare_tolerance(10));
 });
 
-describe("Creating boolean requirement", () => {
-    test("Requirement met when true", () => {
-        const requirement = createBooleanRequirement(ref(true));
-        expect(unref(requirement.requirementMet)).toBe(true);
-    });
+test("Creating visibility requirement", () => {
+    const visibility = ref<Visibility.None | Visibility.Visible | boolean>(Visibility.Visible);
+    const requirement = createVisibilityRequirement({ visibility });
+    expect(unref(requirement.requirementMet)).toBe(true);
+    visibility.value = true;
+    expect(unref(requirement.requirementMet)).toBe(true);
+    visibility.value = Visibility.None;
+    expect(unref(requirement.requirementMet)).toBe(false);
+    visibility.value = false;
+    expect(unref(requirement.requirementMet)).toBe(false);
+});
 
-    test("Requirement not met when false", () => {
-        const requirement = createBooleanRequirement(ref(false));
-        expect(unref(requirement.requirementMet)).toBe(false);
-    });
+test("Creating boolean requirement", () => {
+    const req = ref(true);
+    const requirement = createBooleanRequirement(req);
+    expect(unref(requirement.requirementMet)).toBe(true);
+    req.value = false;
+    expect(unref(requirement.requirementMet)).toBe(false);
 });
 
 describe("Checking all requirements met", () => {
@@ -208,7 +244,7 @@ describe("Checking maximum levels of requirements met", () => {
             createCostRequirement(() => ({
                 resource: createResource(ref(10)),
                 cost: Formula.variable(0),
-                spendResources: false
+                cumulativeCost: false
             }))
         ];
         expect(maxRequirementsMet(requirements)).compare_tolerance(0);
@@ -220,7 +256,8 @@ describe("Checking maximum levels of requirements met", () => {
             createCostRequirement(() => ({
                 resource: createResource(ref(10)),
                 cost: Formula.variable(0),
-                spendResources: false
+                cumulativeCost: false,
+                maxBulkAmount: Decimal.dInf
             }))
         ];
         expect(maxRequirementsMet(requirements)).compare_tolerance(10);
@@ -233,12 +270,12 @@ test("Paying requirements", () => {
         resource,
         cost: 10,
         requiresPay: false,
-        spendResources: false
+        cumulativeCost: false
     }));
     const payment = createCostRequirement(() => ({
         resource,
         cost: 10,
-        spendResources: false
+        cumulativeCost: false
     }));
     payRequirements([noPayment, payment]);
     expect(resource.value).compare_tolerance(90);
diff --git a/tests/utils.ts b/tests/utils.ts
index a1e6084..4252eac 100644
--- a/tests/utils.ts
+++ b/tests/utils.ts
@@ -1,8 +1,9 @@
 import Decimal, { DecimalSource, format } from "util/bignum";
-import { expect } from "vitest";
+import { Mock, expect, vi } from "vitest";
 
 interface CustomMatchers<R = unknown> {
     compare_tolerance(expected: DecimalSource, tolerance?: number): R;
+    toLogError(): R;
 }
 
 declare global {
@@ -36,5 +37,25 @@ expect.extend({
             expected: format(expected),
             actual: format(received)
         };
+    },
+    toLogError(received: () => unknown) {
+        const { isNot } = this;
+        console.error = vi.fn();
+        received();
+        const calls = (
+            console.error as unknown as Mock<
+                Parameters<typeof console.error>,
+                ReturnType<typeof console.error>
+            >
+        ).mock.calls.length;
+        const pass = calls >= 1;
+        vi.restoreAllMocks();
+        return {
+            pass,
+            message: () =>
+                `Expected ${received} to ${(isNot as boolean) ? " not" : ""} log an error`,
+            expected: "1+",
+            actual: calls
+        };
     }
 });