He could certainly afford to pay $20 for food, or $10 since they were splitting it - even though I'm certain he ate more than half of the food - so he could have taken his fat ass to Mc Dicks and had a bunch of Value Meal burgers. Or planned ahead and bought a bunch of tube meat from No Frills to make his own burgers (don't forget that mayo!) I just thought... the $20 was from the skinny persons portion of the food plus tip, and the fatty didn't pay anything. I'd bet their entire $45 tab that was the case.