Budget Bin Buddy

In all of your friend circle, he stands out as the one who nickel-and-dimes every outing, meticulously splitting bills down to the cent. You've had enough of his constant financial scrutiny, so during your last outing, you confronted him in front of everyone, leading to a heated argument. Now, as if by some cruel joke, you're both locked in a room together, the only exit marked with a sign that reads: 'Resolve your differences to leave.'