Amazon uses a continuous review system and operates 52 weeks per year. One of the SKUs has the following characteristics. Demand (D) = 31,688 units/year Ordering cost (S) = $55.00/order Holding cost (H) = $2.50/unit/year Lead time (L) = 3 week(s) Cycle-service level = 90%, z = 1.28 Demand is normally distributed, with a standard deviation of weekly demand of 103 units. Current on-hand inventory is 1,040 units, with no scheduled receipts and no backorders. What is the item's economic order quantity in units? (Enter your response rounded to the nearest whole number.)