moustafa is the purchasing manager for the headquarters of a large insurance company chain with a central inventory operation. moustafa's fastest-moving inventory item has a demand of 15000 units per year. the cost of each unit is 100 sar, and the inventory carrying cost is 10 sar per unit per year. the average ordering cost is 40 sar per order. it takes about 5 days for an order to arrive. (this is a corporate operation, and there are 250 working days per year.) answer the following:

A) What is the EOQ?
B) What is the average inventory if the EOQ is used?
C) What is the optimal number of orders per year?
D) What is the optimal number of days in between any two orders?
E) What is the annual cost of ordering and holding inventory?
F) What is the total annual inventory cost, including cost of the 15,000 units?