Pedregon Corporation has provided the following information: Cost Cost per per Unit Period Direct materials $6.60 $3.60 $1.40 Direct labor Variable manufacturing overhead Fixed manufacturing overhead $23,400 Sales commissions $0.60 0.65 Variable administrative expense $ 3,000 Fixed selling and administrative expense If the selling price is $20.60 per unit, the contribution margin per unit sold is closest to: Multiple Choice $4.15 $5.40 $7.75 $10.40