fast solv plz

Company produced and sold 1.000 units during the month of April. The company incurred the following expenses: direct materials $5.000, direct labor $8,000, total manufacturing overhead cost $20,000, total selling and administrative cost $30,000. Assume that 85% of the total manufacturing overhead cost and 30% of the total selling and administrative costs was variable cost, calculate the variable manufacturing cost per unit O a. 13 O b. 33 Oc 21 O d. 30 e 63