mathematical model

the following notation: Var Denition T = number of periods, d; = demand in period i, i: 1, 2, ...,T, 00 = ordering oost, H C = holding cost per unit and time unit. Problem Costco has received the following demands for a product in 2020: Month 1 2 3 4 5 7 8 9 10 11 12 Demand 3GB 700 BUD 900 3300 200 600 900 200 300 1000 800 Suppose ordering oost {DC} is $584 and holding oost [PIC] of one unit of product in a year is $3. There is no shortage oost. Backordering is not allowed in this model. To achieve the minimum total cost (ordering cost + holding cost), how many times the company should place orders in a year? In each order, how many products should be ordered? What is the total cost in a year