Assume that Limitless Labs, Inc., offers three basic drug-testing services for professional athletes. Here are its prices and costs: Price per Unit Variable Cost per Unit Units Sold per Year Basic $ 500 $ 120 850 Retest 800 400 100 Vital 4,000 2,800 50 Variable costs include the labor costs of the medical technicians at the lab. Fixed costs of $390,000 per year include building and equipment costs and the costs of administration. A basic "unit" is a routine drug test administered. A retest is given if there is concern about the results of the first test, particularly if the test indicates that the athlete has taken drugs that are on the banned drug list. Retests are not done by the laboratory that performed the basic test. A "vital" test is the laboratory's code for a high-profile case. This might be a test of a famous athlete and/or a test that might be challenged in court. The laboratory does extra work and uses expensive expert technicians to ensure the accuracy of vital drug tests. Limitless Labs is subject to a 40 percent tax rate.

Required:

a. How much will Limitless Labs earn each year after taxes?

b. Assuming the above sales mix is the same at the break-even point, at what sales revenue does Limitless Labs break even?

c. At what sales revenue will the company earn $180,000 per year after taxes assuming the above sales mix?

d-1. Limitless Labs is considering becoming more specialized in retests and vital cases. Assume the number of retests increased to 400 per year and the number of vital tests increased to 200 per year, while the number of basic tests dropped to 100 per year?

With this change in product mix, the company would increase fixed costs to $420,000 per year. What would be the effect of this change in product mix on Limitless Labs's earnings after taxes per year?