A family of 4 gets $120 a week here in MN. That is the statistic I heard most recently anyway. They also have good nutritional information programs here when you go into to pick up your stuff/remeet or whatever. They meet in the same room as WIC which we received for a bit when DH was laid off and we had one still on formula.
That's not too bad. That's $17 per day. Now granted it is less than I usually spend but if I had to, I could do $17 per day consistently AND it would still be healthy. Now, If I had to feed the family on $10 consistently, I don't think it could be very healthy.