forecasted demand 1500 1600 1300 1100 quarters 1234 respectively beginning and ending annual

The forecasted demand is 1500, 1600, 1300, 1100, for quarters 1,2,3,4, respectively. The beginning and ending annual inventory is allowed, unit carrying cost of $2/item/quarter, hiring cost is $92/worker, firing cost is $84/worker, and the labor standard is 6.5 hours/unit. What is the minimum cost of the optimal production plan where the total annual cost consists of carring, hiring, and firing?