In the month of June, Pharoah Hebert's Beauty Salon gave 3,000 haircuts, shampoos, and hair colorings at an average price of $45. During the month, fixed costs were $16,200 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, e.8. 5.75.) Contribution margin Unit contribution margin Contribution margin ratio %