A computer-supply mail order house has a memory chip in inventory that it sells to customers around the country. A Japanese manufacturer supplies the item using airfreight. It has the following characteristics: Average annual demand = 3,200 Replenishment lead time = 1.5 weeks Carrying cost = 15% per year Purchase price, delivered = $55 per unit Procurement ordering cost = $35 per order a. Design a reorder point method of control for this item. b. What are the annual ordering and annual carrying costs if your design is used? c. Suppose that the lead time stretches to three weeks, so that the ROP>Q*. What adjustments would you suggest making in the control policy?