E13.10 (LO3, 4), AP Service In the month of March, Style Salon serviced 560 clients at an average price of $120. During the month, fixed costs were $21,024 and variable costs were 60% of sales. Instructions a. Determine the total contribution margin in dollars, the per unit contribution margin, and the contribution margin ratio. b. Using the contribution margin technique, compute the break-even point in dollars and in units.