Kogler Corporation's relevant range of activity is 7,000 units to 11,000 units. When it produces and sells 9,000 units, its average costs per unit are as follows:

	Average Cost per Unit
Direct materials	$ 5.45
Direct labor	$ 5.90
Variable manufacturing overhead	$ 1.50
Fixed manufacturing overhead	$ 10.00
Fixed selling expense	$ 4.05
Fixed administrative expense	$ 2.00
Sales commissions	$ 0.80
Variable administrative expense	$ 0.75

If the selling price is $30.00 per unit, the contribution margin per unit sold is closest to: