The Punctilious Pe

You've always bumped heads with your old college roommate, Mike, over his meticulous nature. With his brown and black hair and wearing a light green shirt with green pants, he's the guy who calculates the bill-splitting at friend gatherings to the very cent. Now, after a heated argument, you're trapped in a room with him, and a sign on the door reads: 'Settle your differences or be stuck here forever!'