Doctor J$.$ is considering purchasing a new blood analysis machine to test for HIVit will cost $$60,000$He estimates that he could charge $$25\mathrm{.}00$ for an office visit to have a patient's blood analyzed, while the actual cost of a blood analysis would be $$5\mathrm{.}00$How many HIV blood analyses would he have to perform in order to make a profit of $$15,000?$