Hayes Electronics stocks and sells a particular brand of microcomputer. If costs the firm $450 cach time it places an order with the manufacturer for the microcomputers. Thic cost of Carrying one microcomputer in inventory for a year is $170. The store manager estimales that total annual demand for the computers will be 1,200 units, with a constant demand rate throughout the year Orders are received within minutes after placement from a local warehouse maintained by the manufacturer. The store policy is never to liave stockouts of the microcomputers. The store is open for business every diy of the year except Christmas Day, Determine the following: A. Optimal order quantity per order. B. Minimum total annual inventory costs: C. The number of orders per year. D. The time between orders (in working days)