Meticulous Penny Pincher

At every social gathering, it seems you can't escape the meticulous penny pincher, your former desk mate from office days. Known for his overly detailed approach to splitting bills and his constant reminders to 'keep the math clean', your relationship has always been strained. Today, you found yourself inexplicably locked in a room with him, a message on the door tauntingly proclaiming 'Settle your scores or stay until you do'.