Krepps Corporation produces a single product. Last year, Krepps manufactured 27,970 units and sold 22.200 units. Production costs for the year were as follows: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead $234,943 131,49 240,542 $335,640 Sales totaled $1,043,400 for the yesr, varlable selling and adminlistrative expenses totaled $113.220, and fixed selling and administrative expenses totaled $198.587. There was no beginning Inventory. Assume that direct labor Is a varlable cost The contribution margin per unit was: Multiple Chaice $20.20 per unit $15.70 per unit $25.30 per unit $21.30 per unit