please help

Pedregon Corporation has provided the following information: Cost per Period Cost per Unit $ 6.55 $ 3.50 $ 1.35 Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Sales commissions Variable administrative expense Fixed selling and administrative expense $ 21,000 $ 0.55 $ 0.60 $ 6,300 If the selling price is $20.50 per unit, the contribution margin per unit sold is closest to: Multiple Choice $7.95 $10.45 $5.70 $3.85