Pedregon Corporation has provided the following information: Cost per Unit Cost per PeriodDirect materials $6.35 Direct labor $3.75 Variable manufacturing overhead $1.50 Fixed manufacturing overhead $15,000Sales commissions $0.50 Variable administrative expense $0.55 Fixed selling and administrative expense $4,500If the selling price is $20.60 per unit, the contribution margin per unit sold is closest to:(A) $6.00(B) $10.50(C) $4.05(D) $7.95