Preble Company manufactures one product. its variable manufacturing overhead is applied to production based on direct tabor-hours and its standard cost card per unit is as folows. The company also established the following cost formulas for its seling expenses: The planning budget for March was based on producing and selling 26,000 units. However, during Morch the company actually produced and sold 31,000 units and incurred the following costs: a. Purchased 155,000 pounds of raw materials at a cost of $720 per pound All of this material was ssed in production. b. Direct-laborers worked 56,000 hours at a rate of $16.00 per hour. c. Total variable manufacturing overhead for the month was $524.720. d. Total advertising, sales salaries and commissions, and shipping expenses were $220,000,$460,000, and $125,000, respectively. 2. What is the materials quantity variance for March? (indicate the effect of each variance by selecting "F* for favorable, "U* for