“It’s all about the Benjamins,” rapped Puff Daddy, using slang for the $100 bill. But the real value of a “Benjamin” depends on where you live. The Tax Foundation, a think-tank, looked at federal data to determine the cost of buying goods in each state relative to the national average. A $100 bill goes furthest in Mississippi, where it is worth $115.34, giving the state 36% more purchasing power than Washington, DC, where $100 is worth only $84.67. In states with high nominal incomes, prices are usually higher—with exceptions. North Dakota, for instance, has high (fracking-fuelled) income without high prices; Hawaii has low income and high prices. But better weather.