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17. A shop owner uses a reorder point approach to restocking a certain raw material. Lead time is five days. Usage of the material during lead time is normally distributed with a mean of 42 pounds and a standard deviation of 5 pounds. When should the raw material be reordered if the acceptable risk of a stockout is 3%? Given: z=1.88 for SL of 1.00-0.03 ROP = expected demand during lead time + Z x Odlr ROP- (give calculations) 18. Inventory information for firm ABC: Inventory at the end of March, 2008 200 units Expected demand during April, 2008: 50 units Production expected during April, 2008 100 units What is the expected inventory at the end of April, 2008 (give calculations)? 19. In the A-B-C classification system, items which account for sixty percent of the total dollar- volume for few inventory items would be classified as items 20. If average demand for an item is 20 units per day, safety stock is 30 units, and lead time is five days, the ROP will be (give calculations)