Petromax Enterprises uses a continuous review inventory control system for one of its SKUs. The following information is available on the item. The firm operates 48 weeks in a year. Refer to the for z-values. Demand =78,000 units/year Ordering cost =$32.50 /order Holding cost =$2.50/ unit / year Average lead time =4 weeks > Standard deviation of weekly demand =200 units a. The economic order quantity for this item is units. (Enter your response rounded to the nearest whole number.)