Jayleen Company makes two products: Carpet Kleen and Floor Deodorizer. Operating information from the previous year follows. Carpet Kleen Floor Deodorizer Units produced and sold 5,000 4,000 Machine hours used 5,000 2,000 Sales price per unit $ 7 $ 10 Variable cost per unit $ 4 $ 8 Fixed costs of $20,000 per year are presently allocated equally between both products. If the product mix were to change, total fixed costs would remain the same. The contribution margin per machine hour for Floor Deodorizer is: