[The following information applies to the questions displayed below.] 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 $11 per pound Direct labor: 3 hours at $12 per hour Variable overhead: 3 hours at $7 per hour $ 55 36 21 Total standard cost per unit $ 112 The planning budget for March was based on producing and selling 21,000 units. However, during March the company actually produced and sold 26,600 units and incurred the following costs: a. Purchased 154,000 pounds of raw materials at a cost of $9.50 per pound. All of this material was used in production. b. Direct laborers worked 63,000 hours at a rate of $13 per hour. c. Total variable manufacturing overhead for the month was $510,930