Nick's Appliance Center sells 200 refrigerators per year. It costs $25 to place an order, and it costs an average of $10 annually to carry one refrigerator in inventory. It takes about 30 business days from the time Nick's Appliance Center places an order until the refrigerators are received. Nick's is open for business 300 days per year. Calculate Nick's Economic Order Quantity. (Do not round until your final answer. Round your final answer to the nearest whole number.)