3) Weekly demand for 12" frames at the Frame Shop is normally distributed with a mean of 500 and a standard deviation of 200. The store manager continuously monitors inventory and currently orders 2,000 frames each time the inventory drops to 1,500 frames. The manufacturer currently takes two weeks to fill an order. a) (3 pts) How much safety inventory does the store carry? What is CSL and fr? b) (4 pts) Frame Shop is targeting a CSL of 90 percent and monitors its inventory continuously. How much safety inventory should Frame Shop carry? What should their ROP be? c) (4 pts) The Frame Shop manager has decided to follow a periodic review policy to manage inventory. They plan to order every three weeks. Given a desired fr of 95 percent, how much safety inventory should the store carry? What should their OUL be? d) (3 pts) The purchasing cost of 12" frames is $100 per unit, and the annual inventory holding ratio is 25%. What is the annual inventory holding cost for the policy in part c)