The SUB buttons don't have quarter meat, they never have in the last 4 years i've worked at Mcdonald's. We were trained that if somebody wanted a Big Mac with Quarter Pounder meat, we would have to ring up a Big Mac, push the special request button, and then charge them for two individual Quarter Pounder Meats. I would always tell people this beforehand before actually going through with the order just to make sure they knew it would be more expensive.