Krepps Corporation produces a single product. Last year, Krepps manufactured 30,140 units and sold 24,600 units. Production costs for the year were as follows: Sales totaled $1,242,300 for the year, varlable selling and administrative expenses totaled $140,220, and fixed selling and administrative expenses totaled $217,008. There was no beginning inventory. Assume that direct labor is a variable cost. The contribution margin per unit was: Multiple Choice $1960 per unit $2520 per unit $2410 per unit Multiple Choice $19.60 per unit $25.20 per unit $24.10 per unit $29.80 per unit