Correct answer is 43603.91 please explain how we can get that answer

Question 15 D 'l 1 pts NowJuice, Inc. produces bottled pickle juice. A planner has developed an aggregate forecast for demand (in cases) for the next four months. Use the following information to develop an aggregate plan using the LEVEL strategy. Inventory holding cost is $1 per month per case and backlog cost is $5 per month per case. Beginning inventory is zero. Month May June July August Forecast 636 452 7'53 592 Cost Per Unit Monthly Capacity Regular Production 15.18 400 Overtime Production 1.5 x Regular Prod Cost 400 What is the TOTAL cost of using the LEVEL plan ? 44,771.41 er 3 43,603.91 margin of error +i 0.001