Pedregon Corporation has provided the following information:

	Cost per Unit			Cost per Period
Direct materials	$	6.55
Direct labor	$	3.50
Variable manufacturing overhead	$	1.35
Fixed manufacturing overhead				$	21,000
Sales commissions	$	0.55
Variable administrative expense	$	0.60
Fixed selling and administrative expense				$	6,300

If the selling price is $20.50 per unit, the contribution margin per unit sold is closest to:

a. $4.45

b. $5.60

c. $7.95

d. $10.45