Pedregon Corporation has provided the following information:

	Cost per Unit			Cost per Period
Direct materials	$	7.30
Direct labor	$	4.20
Variable manufacturing overhead	$	1.55
Fixed manufacturing overhead				$	23,400
Sales commissions	$	0.75
Variable administrative expense	$	0.85
Fixed selling and administrative expense				$	4,900

If the selling price is $22.00 per unit, the contribution margin per unit sold is closest to: