Krepps Corporation produces a single product. Last year, Krepps manufactured 34,060 units and sold 28,600 units. Production costs for the year were as follows: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead $255,450 $173,706 $269,074 $518,900 Sales totaled $1,172,600 for the year, variable selling and administrative expenses totaled $148,720. and fored selling and administrative expenses totaled $214.578. There was no beginning Inventory. Assume that direct labor is a variable cost. The contribution margin per unit was: Multiple Choice O $20.50 per unit O S1080 per un O $16.40 per unit O $150 ser une