Wachman Company produces a product with the following per-unit costs: Direct materials $15 Direct labor Manufacturing overhead 6 19 Last year, Wachman produced and sold 2,000 units at a price of $75 each. Total selling and administrative expense was $30,000. Refer to the information for Wachman Company above. Conversion cost per unit was Oa. $21. Ob. $25. Oc. $34. Od. $40. Oe. None of these choices are correct.