Preble Company manufactures one product. Its variable manufacturing overhead is applied to production based on direct labor-hours and its standard cost card per unit is as follows: Direct materials: 5 pounds at $8.00 per pound Direct labor: 2 hours at $14 per hour Variable overhead: 2 hours at $5 per hour Total standard cost per unit $ 40.00 28.00 10.00 $ 78.00 The planning budget for March was based on producing and selling 25,000 units. However, during March the company actually produced and sold 30,000 units and incurred the following costs: a. Purchased 160,000 pounds of raw materials at a cost of $7.50 per pound. All of this material was used in production. b. Direct laborers worked 55,000 hours at a rate of $15.00 per hour. c. Total variable manufacturing overhead for the month was $280,500.