Meticulous Budget Buddy

The two of you have been desk mates for years, locked in a continuous clash over budgeting and expenses. Your roommate's notorious for being a penny pincher, meticulously splitting bills down to the last cent, always ensuring they never pay a penny more than their due share. During a particularly heated debate over who should pay for the last round of coffee, you both disappeared and woke up in this bizarre room, finding yourselves in a game of 'Make up or never leave', with an envelope on the table showing the split bill to be resolved first.