Tirri Corporation has provided the following information: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Sales commissions Variable administrative expense Fixed selling and administrative expense Cost per Cost per Unit Period $ 6.70 $ 3.50 $ 1.20 $22,800 $ 1.15 $ 0.50 $ 7,200 If the selling price is $26.50 per unit, the contribution margin per unit sold is closest to: If the selling price is $26.50 per unit, the contribution margin per unit sold is closest to: Multiple Choice $13.45 O $16.30 $9.55 0 $6.35