One of the things that the chart doesn't take into account is regional cost of food. I can get local, organic produce year round at a reasonable price. But I also have about 10 farmer's markets within 10 miles of my home. And that's not counting the farm stands. I can go to a farmer's market every day of the week if I wanted to. Meat I buy in bulk and store in Joy's chest freezer. I can get eggs in the summer from my sister when her hens over produce. She keeps her chickens in a large open chicken coop where they can eat bugs and fresh grass. they can't be totally free range because of the coyotes.
I totally agree with this. We are in a major metro area, no gardening or hunting/gathering, no farms nearby, farmers' markets only in the summer (and then they're not cheaper than the grocery store, just better stuff). My best price on organic eggs, for example, is $3.29/dozen, which I'm sure makes most of you cringe. Organic ground beef is $4.99/lb. at Costco, $5.99 otherwise, etc. etc. I stock up during sales, but there is no room for a major pantry in our apt. Add to that two parents working, read: I cut corners by buying packaged stuff for lunches, although I don't buy TV dinners and that sort of thing. So, nope, we don't make it under the moderate level, although I try. When my freelance work ebbs a bit I do make more snacks, granola, etc. from scratch, which helps.