Well you've got to compensate for all the organs and bone in the human which would just go to waste. Pound for pound for just the meat you'd probably be paying more than $2.99 per pound. Plus he looks a little bulky and I guarantee you there's no marbling.
Dude in coat wants to by some of that delicate assistant meat from the butcher. Butcher is considering it, but trying to keep the assistant (back turned) from hearing the discussion.
Commentary on animal consumption, as a lot of Larson's comics were. I've never looked to see if he was/is a veggie person.