Tirri Corporation has provided the following information: Cost per Unit Cost per Period Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Sales commissions Variable administrative expense Fixed selling and administrative expense 6.90 $3.90 $1.40 $23,200 $1.00 $0.70 7,600 If the selling price is $26.90 per unit, the contribution margin per unit sold is closest to: Multiple Choice 7.00 $13.00 $16.10 $10.00