Sininsky Corporation is a small producer of synthetic motor oil. During May, the company produced 5,000 cases of lubricant. Each case contains twelve quarts of synthetic oil. To achieve this level of production, Sininsky purchased and used 16,500 gallons of direct materials at a cost of $20,035. It also incurred average direct labor costs of $13 per hour for the 4,056 hours worked in May by its production personnel. Manufacturing overhead incurred for the month totaled $9,200.