Jose and Tina are married, and they work part-time as salespeople for two different companies. They both sell fish tanks to high-end (fancy) restaurants in New York City. Jose's employer (boss) pays him a monthly salary of $1400 plus a commission of $75 for each fish tank that he sells. Tina's employer does not pay her a salary, rather they pay her a commission of $250 for every fish tank that she sells. Tina tells Jose that she has a better deal than he does because she makes more money on each fish tank sold. Jose contends this isn't true. "I have a better deal," he says, "because I get paid even if I sell zero fish tanks." Who is correct? Why?