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: Average Cost per Unit Direct materials $ 5.80 Direct labor $ 3.30 Variable manufacturing overhead $ 1.50 Fixed manufacturing overhead $ 4.00 Fixed selling expense $ 2.80 Fixed administrative expense Sales commissions $ 2.00 $ 1.00 Variable administrative expense $ 0.50 Foundational 1-13 (Algo) 13. If the selling price is $21.80 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