I'm not sure what you think, but you're actually getting more for your money from your health food store.
Though hamburgers from McDonald's are actually cheaper than a dollar, last time I know, unless the person either has a stomach the size of a pea or an appetite of a little old lady, a measly hamburger isn't going to cut it. In case you haven't noticed, their hamburgers are pretty small (I'm trying my best to resist saying any profanity, here,) so again, unless they've got either of those things, they're likely going to go after something more substantial, & thus more expensive, foods on the menu. Granted, there are things that are worth a dollar, but here's the thing: a Value Meal will cost at least $3, not including taxes. If you take into account that the person goes there for lunch & dinner, that's $6 in food for one day, not including breakfast. With breakfast, it'll likely be costing around $8-$10, For a week, that's around $54-$70, at the very least.
The numbers don't lie, Bird.