Fullerton Enterprises uses a continuous review inventory control system for one of its SKUs. The following information is available on the item. The firm operates 50 weeks in a year. Demand = 91.000 units/year Ordering cost = $60/order Holding cost-$4.5/unit/year Lead time = 16 weeks constant Standard deviation of weekly demand - 40 units If Fullerton wants to provide a 95.99% service level, what is the required amount of safety stock? (Enter your response rounded to the nearest whole number.)