A hospital uses methicillin, an antibiotic, In its daily operations. Demand for the antibiotic is normal with a mean of 58 pills a day and a standard deviation of 16 plils per day. It takes the suppler for the hospital 5 days to ship an order to the hospital once the order is made; the standard deviation for this lead time is 2 day. The hospital insists on a service level of 99.9%. What is the minimum safely stock that the hospital uses for the antibiotic