Tirri Corporation has provided the following Information:
Cost per Unit Cost per Period
Direct materials $7.50
Direct labor $3.85
variable manufacturing overhead $1.55
Pixed manufacturing overhead $24,400
Sales commissions $1.05
Variable administrative expense $0.60
Fixed selling and administrative expense $ 8,800
If the selling price is $28.10 per unit, the contribution margin per unit sold is closest to:
a) $16.75
b) $705
c) $13.55
d) $10.70