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 material: 8 pounds at $10.00 per pound Direct labor: 5 hours at $13 per hour Variable overhead: 5 hours at $8 per hour Total standard variable cost per unit $ 80.00 65.00 40.00 $ 185.00 The company also established the following cost formulas for its selling expenses: Variable Cost per Fixed Cost Unit Sold Advertising Sales salaries and commissions Shipping expenses per Month $ 290,000 $ 280,000 $ 21.00 $ 12.00 The planning budget for March was based on producing and selling 15,000 units. However, during March the company actually produced and sold 17,000 units and incurred the following costs: a. Purchased 170,000 pounds of raw materials at a cost of $8.00 per pound. All of this material was used in production. b. Direct-laborers worked 64,000 hours at a rate of $14.00 per hour. c. Total variable manufacturing overhead for the month was $513,920. d. Total advertising, sales salaries and commissions, and shipping expenses were $300,000, $500,000, and $205,000, respectively.