The Spark

I was reading about Poverty In the United States, and the article mentioned that the original definition of "poverty" in the US was based on the original Economy Food Plan designed by the US Department of Agriculture. Since the Economy Food Plan was "the least costly of four nutritionally adequate food plans designed by the Department of Agriculture", I first want to see what the US Government thinks is the minimum required for healthy living, then I want to see what is possible under those constraints.