In the month of June, Bonita Beauty Salon gave 2,700 haircuts, shampoos, and permanents at an average price of $30. During the month, fixed costs were $18,000 and variable costs were 70% 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.