diff --git a/src/spaceone/cost_analysis/manager/config_manager.py b/src/spaceone/cost_analysis/manager/config_manager.py
index f732bec..96e60a0 100644
--- a/src/spaceone/cost_analysis/manager/config_manager.py
+++ b/src/spaceone/cost_analysis/manager/config_manager.py
@@ -71,7 +71,7 @@ def _get_default_unified_cost_config() -> dict:
             "run_hour": config.get_global("UNIFIED_COST_RUN_HOUR", 0),
             "aggregation_day": config.get_global("UNIFIED_COST_AGGREGATION_DAY", 15),
             "is_last_day": False,
-            "exchange_source": "Yahoo Finance!",
+            "exchange_source": "Yahoo! Finance",
             "exchange_date": 15,
             "is_exchange_last_day": False,
             "exchange_rate_mode": "AUTO",
diff --git a/src/spaceone/cost_analysis/service/cost_query_set_service.py b/src/spaceone/cost_analysis/service/cost_query_set_service.py
index 4a881b5..bbd1742 100644
--- a/src/spaceone/cost_analysis/service/cost_query_set_service.py
+++ b/src/spaceone/cost_analysis/service/cost_query_set_service.py
@@ -1,6 +1,8 @@
 import logging
 
 from spaceone.core.service import *
+
+from spaceone.cost_analysis.manager import DataSourceManager
 from spaceone.cost_analysis.manager.cost_query_set_manager import CostQuerySetManager
 from spaceone.cost_analysis.model.cost_query_set_model import CostQuerySet
 
@@ -16,6 +18,7 @@ class CostQuerySetService(BaseService):
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
+        self.data_source_mgr: DataSourceManager = DataSourceManager()
         self.cost_query_set_mgr: CostQuerySetManager = self.locator.get_manager(
             "CostQuerySetManager"
         )
@@ -44,6 +47,14 @@ def create(self, params):
             cost_query_set_vo (object)
         """
 
+        domain_id = params["domain_id"]
+        data_source_id = params["data_source_id"]
+
+        if data_source_id != "unified-cost-data-source":
+            self.data_source_mgr.get_data_source(
+                domain_id=domain_id, data_source_id=data_source_id
+            )
+
         return self.cost_query_set_mgr.create_cost_query_set(params)
 
     @transaction(
diff --git a/src/spaceone/cost_analysis/service/unified_cost_service.py b/src/spaceone/cost_analysis/service/unified_cost_service.py
index 05a7798..ffb7286 100644
--- a/src/spaceone/cost_analysis/service/unified_cost_service.py
+++ b/src/spaceone/cost_analysis/service/unified_cost_service.py
@@ -122,7 +122,7 @@ def run_unified_cost(self, params: dict):
             currency_map, exchange_date = currency_mgr.get_currency_map_date(
                 currency_end_date=exchange_date
             )
-            exchange_source = "Yahoo Finance!"
+            exchange_source = "Yahoo! Finance"
         else:
             currency_map = unified_cost_config["custom_exchange_rate"]
             exchange_source = unified_cost_config.get("exchange_source", "MANUAL")