In Malaysia, Hijau Berhad imports and sells unique adjustable comb to a range of customers. The business is reevaluating its sourcing guidelines. Next year, it anticipates selling 31,200 combs. Each comb costs RM4.80 and is offered for sale in dozens. The anticipated cost of storage and other carrying is RM0.20 per comb. The ordering cost is RM40 per order. The delivery time is two weeks, and there are 6,000 combs in the safety stock. About 28,000 dozen of these combs are needed each year to meet demand. Calculate: a) The optimal economic order quantity. b) The annual inventory cost for the company if it orders in this quantity.