He plans to sell the premium wax for $73 per tub. He estimates fixed costs such as travel costs, booth rental cost, and lodging to be $720 per car show. Read the Requirement 1. Determine the number of tubs Evan must sell per show to break even. Begin by identifying the formula to compute the sales in units at various levels of operating income using the contribution margin approach. Requirements 1. Determine the number of tubs Evan must sell per show to break even. 2. Assume Evan wants to earn a profit of $1,080 per show. a. Determine the sales volume in units necessary to earn the desired profit. b. Determine the sales volume in dollars necessary to earn the desired profit. c. Using the contribution margin format, prepare an income statement (condensed version) to confirm your answers to parts a and b. 3. Determine the margin of safety between the sales volume at the breakeven point and the sales volume required to earn the desired profit. Determine the margin of safety in both sales dollars, units, and as a percentage