Update app.py

app.py

@@ -52,7 +52,7 @@ def get_revenue(idx):
 
 def get_costs(idx):
     indexation = math.floor(idx / 12)
-    wage_fund_with_indexation = math.pow((Social_benefits_for_one_employee + Monthly_salary_rate), indexation)
+    wage_fund_with_indexation = (Social_benefits_for_one_employee + Monthly_salary_rate) * math.pow(Rate_CPI, indexation)
     
     Expected_repair_costs_per_month = Number_machines * Equipment_breakdown_rate * The_cost_of_repairing_one_car
     Wage_Fund = Number_employees * wage_fund_with_indexation