The buyer at Evans Enterprises purchases brackets for a high production item. The annual demand is 800 units. The following price structure was offered to the buyer: Purchase size: less than 100 units = $16, 100 up to 299 = $14.50, 300 and over = $13.00. The inventory carrying cost rate is 30% and each purchase order costs $120. What is the order quantity the buyer should use to minimize the total cost?