[Tuna-Fish]

> Why even have such a measure unless it's going to be at least $10/day as one likely needs at least that much just to feed themselves the cheapest possible food they can find.

Out of touch much? While studying, I fed myself with about $10-15 a week, and I ate better quality food than most people. I live in a place where food is more expensive than the US.

You can buy the calories you need per day for individual cents, if you buy potatoes in bulk. Above that, buy basic ingredients in large quantities, and you will have plenty of money left for fresh greens to top off you meals. Don't eat meat in every meal, and meat should always be a flavoring, not what makes up most of the meal.