Tirri Corporation has provided the following information: Cost per Period Cost per Unit $ 7.05 $ 4.20 $ 1.55 Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Sales commissions Variable administrative expense Fixed selling and administrative expense $ 23,500 $ 1.15 $ 0.40 $ 7,900 If the selling price is $27.20 per unit, the contribution margin per unit sold is closest to: Multiple Choice $15.95 Multiple Choice $15.95 $10.27 $7.18 O $12.85