KVS Pharmacy fills prescriptions for a popular antibiotic medication. The daily demand is not constant but is assumed to follow the normal distribution with mean of 200 ounces and standar d deviation of 80 ounces. The antibiotic's vendor stops into the KVS store every 30 days to conduct a physical inventory of the ounces remaining. During the most recent inventory there were 60 ounces of the antibiotic on hand and it takes four days to receive an order after the order is placed. Given this information, determine the optimal order size that will allow KVS to maintain a 99% service level.