Given this information: Expected demand during lead time = 320 units Standard deviation of lead time demand = 20 units Use Table. Determine each of the following, assuming that lead time demand is distributed normally:
a. The ROP that will provide a risk of stockout of 1 percent during lead time. (Round your answer to the nearest whole number.) ROP units
b. The safety stock needed to attain a 1 percent risk of stockout during lead time. (Do not round intermediate calculations. Round your answer to the nearest whole number.)