In the month of June, Sandhill Hebert's Beauty Salon gave 4,000 haircuts, shampoos, and hair colorings at an average price of $ 35. During the month, fixed costs were $ 17,500 and variable costs were 80% of sales. (a) Determine the contribution margin in dollars, per unit and as a ratio. (Round contribution margin per unit to 2 decimal places, eg. 5.75.) Contribution margin $ Unit contribution margin $ Contribution margin ratio 96