Yuma Tax Service prepares tax returns for low- to middle-income taxpayers. Its service operates January 2 through April 15 at a counter in a local department store. All jobs are classified into one of three categories: standard, multiform, and complex. Following is information for last year. Also, last year, the fixed cost of rent, utilities, and so forth were $45,000. a. Determine Yuma's break-even dollar sales volume. b. Determine Yuma's margin of safety in sales dollars. c. Prepare a profit-volume graph for Yuma's Tax Service