In June, Cullumber Salon gave 4,600 haircuts, shampoos, and permanents at an average price of $50. During the month, fixed costs were $34.000 and variable costs were 80% of sales. (a) Determine the contribution margin in dollars, per unit, and as a ratio. (Round per unit value to 2 decimal places, e.g. 52.75 and final answer to 0 decimal places, e.g. 5,275.) Contribution margin (in dollars) $ Contribution margin (per unit) $ Contribution margin (ratio) %