Jimmy's Delicatessen sells large tins of Tom Tucker's Toffee. The deli uses a periodic review system, checking inventory levels every 8 days, at which time an order is placed for more tins. Order lead time is 4 days. Average daily demand is 10 tins, so average demand during the reorder period and order lead time (12 days) is 120 tins. The standard deviation of demand during this same 12-day period is 16 tins