Which three letters are missing?

A very successful businessman had a meeting with his new son-in-law. I welcome you into the family,” said the man. “To show you how much we care for you, I am making you a 50-50 partner in my business. All you have to do is go to the factory everyday and learn the operation.”
The son-in-law interrupted. “I hate factories. I can’t stand the noise.” “I see.” replied the father-in-law, “Well, then you’ll work in the office and take charge of some of the operations.” “I hate office work,” said the son-in-law. “I can’t stand being stuck behind a desk.” “Wait a minute,” said the father-in-law. “I just made you half owner of a money-making industry, but you don’t like factories, and won’t work in an office. What am I going to do with you?” “Easy,” said the son-in-law. “Buy me out.”