I'm doing more research now and here's my findings so far:
- The USDA issued Low Cost, Moderate Cost and Liberal Food Plans in 2007. These plans "serve as a national standard for a nutritious diet at a minimal cost."
- According to the Official USDA Food Cost list for October 2013, it should cost me $206.60 a week to feed my family of 6 the "Thrifty Food Plan." (I've been spending from $100-$125 and trying to lower that!)