I'm sure most people who are employed make money from their employment but they're also not running a business which has "costs", "revenue" and, hopefully, "pro

I'm sure most people who are employed make money from their employment but they're also not running a business which has "costs", "revenue" and, hopefully, "profit". They enter a contract with such a business which will treat the individual's salary as a "cost" which lessens the "profit" from the "revenue".