The Devon Motor Company produces motorcycles. During April, the company purchased 8,000 batteries at a cost of $10 per battery. Devon withdrew 7,600 batteries from the storeroom during the month. Of these, 100 were used to replace batteries in motorcycles used by the company's traveling sales staff. The remaining 7,500 batteries withdrawn from the storeroom were placed in motorcycles being produced by the company. Of the motorcycles in production during April, 90% were completed and transferred from work in process to finished goods. Of the motorcycles completed during the month, 30% were unsold at April 30