Both drop downs say

continuous or periodic

You are in charge of inventory control of a highly successful product retailed by your firm. Weekly demand for this item varies, with an average of 100 units and a standard deviation of 20 units. It is purchased from a wholesaler at a cost of $10.00 per unit. The supply lead time is 9 weeks. Placing an order costs $45.00, and the inventory carrying rate per year is 15 percent of the item's cost. Your firm operates 6 days per week, 52 weeks per year. Refer to the standard normal table for z-values. a. What is the optimal ordering quantity for this item? 559 units. (Enter your response rounded to the nearest whole number.) b. How many units of the item should be maintained as safety stock for 99 percent protection against stockouts during an order cycle? 140 units. (Enter your response rounded to the nearest whole number.) c. If supply lead time can be reduced to 5 weeks, what is the percent reduction in the number of units maintained as safety stock for the same 99 percent stockout protection? |%. (Enter your response rounded to two decimal places.)