diff --git a/source/arche/toolkit.rst b/source/arche/toolkit.rst
index 27719d0e..07077f35 100644
--- a/source/arche/toolkit.rst
+++ b/source/arche/toolkit.rst
@@ -114,3 +114,61 @@ Geographic Informasion System (GIS) Class [C++]
   The ``cyclus::toolkit::GIS`` class provide an option to add geographic coordinates
   of its friend classes. Haversine distance calculations between two facilities or
   agents with GIS coordinates can be performed as well.
+
+Multi-Resource Buffer Inventory Tracker [C++]
++++++++++++++++++++++++++++++++++++++++++++++
+  The ``cyclus::toolkit::TotalInvTracker`` class tracks the total quantity of
+  resources held across multiple Resource Buffers. The Tracker may have a 
+  total inventory limit separate from any individual Resource Buffer limits. 
+
+  Implementing a tracker can be useful in replicating a facility-wide limit. 
+  A TotalInvTracker is required to initialize the Material Buy Policy.
+
+Material Buy Policy Class [C++]
++++++++++++++++++++++++++++++++
+  The ``cyclus::toolkit::MatlBuyPolicy`` class manages the process of requesting
+  a particular commodity. 
+
+  The following inventory management strategies are available:
+
+  * Active and dormant cycles. Developer must create two random distributions 
+    using the ``cyclus::RandomNumberGenerator`` class. The active distribution is
+    sampled to determine the length of time steps that the agent will be actively 
+    requesting its incommodity. The dormant distribution is sampled to determine
+    the length of time steps that the agent will be dormant, placing no requests
+    regardless of whether inventory space is available at the time.
+
+  * Cumulative capacity. Cumulative capacity is a type of active-dormant cycle
+    where the active phase is determined not by sampling from a random distribution,
+    but by the cumulative quantity of incommodity that the agent has received 
+    during this cycle. The facility will stay active until the cumulative quantity
+    is reached, at which point it will enter the dormant phase. The dormant 
+    phase functions exactly as in the active-dormant cycle.
+
+  * Buying size distribution. Similar to active and dormant cycles, the size of
+    request placed by an agent can be determined by a random distribution. The
+    sampled value is a fraction of the maximum available request, which is 
+    determined by the throughput and inventory space available both in the receiving
+    ``ResBuf`` and in the entire facility, using the ``TotalInvTracker``.
+
+  * Quantized buying. The agent can be set to request a fixed quantity of its
+    incommodity, when space allows. It will not accept partial fulfillment of its
+    request.
+
+  * Inventory policies. Two standard inventory policies are available, called
+    reorder point-reorder quantity or (R,Q), and minimum-maximum or (s,S). The
+    ``inv_policy`` parameter must be set to either "RQ" or "sS" to use these. Two
+    additional parameters determine the behavior, ``req_at`` and ``fill_behav``. 
+    For both policies, ``req_at`` is the inventory quantity at which new 
+    incommodity should be ordered. Above this point, the agent will not place a
+    request. Below this point, the agent will place a request. For the (R,Q)
+    policy, ``fill_behav`` is the Q, or quantity of incommodity that the agent 
+    will request. This functions similar to quantized buying, where the agent
+    seeks to buy exactly Q / ``fill_behav`` quantity of incommodity. For the (s,S)
+    policy, ``fill_behav`` is the S, or the maximum quantity of incommodity that
+    the agent will accept. The agent will request S minus the current inventory.
+
+Material Sell Policy Class [C++]
+++++++++++++++++++++++++++++++++
+  The ``cyclus::toolkit::MatlSellPolicy`` class manages the process of providing
+  a particular commodity to the DRE.
\ No newline at end of file
diff --git a/source/user/writing_input.rst b/source/user/writing_input.rst
index 5ac25c45..3297ca34 100644
--- a/source/user/writing_input.rst
+++ b/source/user/writing_input.rst
@@ -135,6 +135,7 @@ any order in the input file:
    input_specs/region
    input_specs/inst
    input_specs/recipe
+   input_specs/package
 
 Including XML Files
 --------------------