This need to come as no surprise since they are normally responsible for approximately 50% of a dealer's gross earnings. What is a future in finance. 80% of the financing supervisor's income comes in the kind of commissions on the products they sell, so you can ensure they're going to be extremely reliable salesperson - and high pressure as well. They are easily the most dangerous person you will encounter at a car dealership. They are trained to draw money out of your pockets while making…