I made enough off you last night to pay for it twice over
During the scene between Burt and Eddie at the bar discussing the first pool match with Fats. Burt tells Eddie about how he gets a new car each year, and he made enough off Eddie to pay for it twice over.
During the game, Eddie was up $18000 before he went on his slide, now we all know Charlie gave the money back to Eddie to play minus Charlie's cut, but in order for Burt to "make money" especially enough to pay the car off twice, Eddie would have had to dip into about $10000 of their own funds after the $18000 was given back.
The fact that Charlie wouldn't give back his cut of the profit, how could Eddie have dipped into their money?