A retail shop uses a periodic review inventory system. The annual demand for a consumer product sold by the shop is 5500 units, the ordering cost is $43 per order, and the inventory carrying rate is 35% per year. The product costs $100 per unit. The daily demand for the product is normally distributed with a mean of 15 units and a standard deviation of 3 units. If the procurement lead time is a constant 5 days h42 and the retail shop desires a 90% probability of no stockout during lead time, compute: (a) Optimal review period (b) Safety stock, SS (e) Maximum inventory, S (d) Order quantity, if the on-hand inventory is 24 units. (e) New safety stock if the shop intends to use a new service level criterion -- that is to limit stockout to 1 order cycle per year (instead of 90% service level)