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 . 40 Direct labor $5 . 80 Variable manufacturing overhead $1 . 45 Fixed manufacturing overhead $9. 00 Fixed selling expense $4.00 Fixed administrative expense $1 . 90 Sales commissions $0. 70 Variable administrative expense $0 . 65 If the selling price is $28.00 per unit, the contribution margin per unit sold is closest to: Multiple Choice O $16.80