Zebra Corporation has provided the following information: Cost per Unit Cost per Period Direct materials $ 6.90 Direct labor $ 3.90 Variable manufacturing overhead $ 1.40 Fixed manufacturing overhead $ 23,200 Sales commissions $ 1.00 Variable administrative expense $ 0.70 Fixed selling and administrative expense $ 7600 If the selling price is $26.90 per unit, the contribution margin per unit sold is closest to: $16.10 $10.00 $7.00 $13.00