1) Tirri Corporation has provided the following information Cost per Unit $ 6.85 $ 3.90 S 1.25 Cost per Period Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Sales commissions Variable administrative expense Fixed selling and administrative expense S 22,500 S 1.00 S 0.55 S 7,500 If the selling price is $26.20 per unit, the contribution margin per unit sold is closest to A) $12.65 B) S6.65 C) $15.45 D) S9.70