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Preble Company manufactures one product 111 variable manufacturing overhead is applied to production based on direct labor-hours and its standard cost card per urn s as follows: The company also established the following cost formulas for its selling expenses: The planning budget for March was eased on producing and selling 32.000 units. However, during March the company actuary produced and sold 37.600 units and incurred the following costs: a. Purchased 200,000 pounds of raw materials at a cost of $9.40 per pound. All of this material was used in production. b. Direct-laborers worked 65,000 hours at a rate of $14,00 per hour. c. Total variable manufacturing overhead for the month was $525,000. d. Total advertising, sales salaries and commissions, and shipping expenses were $416,000 $525200 and $135,000, respectively. What is the direct labor efficiency variance for March? What variable manufacturing overhead cost would be included in the company's flexible budget for March? What is the variable overhead efficiency variance for Marc? What is the variable overhead rate variance for March