Macy Corporation's relevant range of activity is 6,900 units to 14,500 units. When it produces and sells 10,700 units, its average costs per unit are as follows: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Fixed selling expense Fixed administrative expense Sales commissions Variable administrative expense Average Cost per Unit $ 5.30 $ 3.75 $ 1.75 $ 3.30 $ 1.05 $ 0.75 $ 1.00 $ 0.65 If the selling price is $30.00 per unit, the contribution margin per unit sold is closest to: Multiple Choice O $7.00 O $10.80 $17.55 O O $20.95