Uh, that's not how poverty is calculated at all.
http://www.irp.wisc.edu/faqs/faq2.htm
The U.S. Census Bureau determines poverty status by comparing pre-tax cash income against a threshold that is set at three times the cost of a minimum food diet in 1963, updated annually for inflation using the Consumer Price Index, and adjusted for family size, composition, and age of householder.
http://www.census.gov/library/infographics/poverty_measure-how.html
The article that was started in the other thread calculated poverty as being below half the median household income. So there are different definitions.
http://www.nwlc.org/our-issues/poverty-%2526-income-support/data-on-poverty-%2526-income
That's just one of many.
Care to quote or point out where the different poverty-threshhold calculations are in your link? I went there and didn't see any other than relying on the Census Bureau's threshhold which I've shown the calculation for above.