The company also established the following cost formulas for its selling expenses: The planning budget for March was based on producing and selling 20,000 units. However, during March the company actually produced and sold 24,600 units and incurred the following costs: a. Purchased 164,000 pounds of raw materials at a cost of $7,50 per pound. All of this material was used in production. b. Direct-laborers worked 57,000 hours at a rate of $17,00 per hour. c. Total variable manufacturing overhead for the mohth was $653,220. d. Total advertising, sales salaries and commissions, and shipping expenses were $235,000,$465,000, and $135,000, respectively. Foundational 9-10 (Algo) 10. What is the variable overhead efficiencv variance for March? IIndicate the effect of each variance bv selectina "F" for favorable