Last year, Barnard Company incurred the following costs: direct materials, $50,000; direct labor, $20,000; manufacturing overhead, $130,000; selling expense, $40,000; administrative expense, $36,000. Barnard produced and sold 10,000 units at a price of $31 each. Refer to the information for Barnard Company above. Prime cost per unit is a. $7.00 b. $20.00 c. $15.00 d. $5.00 e. $27.60