Required information [The following information applies to the questions displayed below.] Martinez Company's relevant range of production is 7,500 units to 12,500 units. When it produces and sells 10,000 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 $6.20 $ 3.70. $ 1.60 $ 4.00 $ 3.20 $ 2.20 $1.20 $ 0.45 13: If the selling price is $22.20 per unit, what is the contribution margin per unit? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Contribution margin per unit