diff --git a/src/calculation_time_constrains/service.py b/src/calculation_time_constrains/service.py
index a44bf76..3d2a456 100644
--- a/src/calculation_time_constrains/service.py
+++ b/src/calculation_time_constrains/service.py
@@ -1036,7 +1036,7 @@ class OptimumCostModel:
         location_tag: str,
         token: str
     ):
-        failure_rate_url = f"{self.api_base_url}/reliability/asset/failure-rate/{self.location_tag}"
+        failure_rate_url = f"{self.api_base_url}/reliability/asset/failure-rate/{location_tag}"
         try:
             response = requests.get(
                 failure_rate_url,
diff --git a/src/overhaul_activity/service.py b/src/overhaul_activity/service.py
index 48702d3..b6d5402 100644
--- a/src/overhaul_activity/service.py
+++ b/src/overhaul_activity/service.py
@@ -95,6 +95,10 @@ async def get_all(
             ).distinct()
     )
 
+    num_equipments = len((await common['db_session'].execute(query)).scalars().all())
+
+    material_cost = get_material_cost("B", num_equipments)
+
 
     equipments = await search_filter_sort_paginate(model=query, **common)
     data = equipments['items']
@@ -106,7 +110,7 @@ async def get_all(
             continue
         res = OverhaulActivityRead(
             id=equipment.id,
-            material_cost=350000000000,
+            material_cost=material_cost,
             service_cost=200000000,
             location_tag=equipment.location_tag,
             equipment_name=equipment.master_equipment.name if equipment.master_equipment else None,