Tirri Corporation has provided the following information: r Uhit Cost per Peri Direct materials Direct labor Variable manuf acturins overhead Fixed manufacturing overhead Sales commissions Variable administ rative expense Fixed selling and adninistrat ive expense 6.75 $3.60 1.25 $22.900 1.20 0.55 7.300 If the selling price is $26.60 per unit, the contribution margin per unit sold is closest to: Multiple Choice $13.25 $6.60 $16.25