Krepps Corporation produces a single product. Last year, Krepps manufactured 33,910 units and sold 28,100 units. Production costs for the year were as follows: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead $247,543 $176,332 $284,844 474,740 Sales totaled $1,405,000 for the year, variable selling and administrative expenses totaled $148,930, and fixed selling and administrative expenses totaled $247,543. There was no beginning inventory. Assume that direct labor is a variable cost. The contribution margin per unit was