If mean daily demand is 20 units, lead time is 7 days, the standard deviation of demand during lead time is 12.0 units, and management has a preferred service level of 99.9% (z = 3), the reorder (R) level for the item would be a. 56.00 units. b. 176.00 units.
c. 152.00 units d. 104.00 units