In the month of June, Paulas Beauty Salon gave 3,500 haircuts, shampoos, and permanents at an average price of $30. During the month, fixed costs were $16,800 and variable costs were 80% of sales. Instructions (a) Determine the contribution margin in dollars, per unit and as a ratio. (b) Using the contribution margin technique, compute the break-even point in dollars and in units. (c) Compute the margin of safety in dollars and as a ratio