Hudson-473 Inc. has provided the following information: Cost per Unit Cost per Period Direct materials $ 7.15 Direct labor $ 3.90 Variable manufacturing overhead $ 1.40 Fixed manufacturing overhead $ 16,200 Sales commissions $ 0.60 Variable administrative expense $ 0.70 Fixed selling and administrative expense $ 6,600 The company expects to sell 10,000 units. If the selling price is $21.70 per unit, the contribution margin per unit sold is closest to: