Demand =9 boxes per week Order cost =$30/ order Lead-time =5 weeks Item cost =$60/ box Std. deviation in weekly demand =6 Inventory-holding cost =15 percent per year Service level =98 percent units on-hand. There were no scheduled receipts and 25 units were on backorder. a. What is the review period (T) ? Do not round intermediate calculations. Round your answer up to the nearest whole number. weeks b. What is stock replenishment level with safety stock (M) ? Do not round intermediate calculations. Round your answer to the nearest whole number. bottles c. How many units should be ordered? Do not round intermediate calculations. Round your answer to the nearest whole number. orders/year