Right at the end, the number I was looking for:

Professor Richardson also believes that party balloons filled with helium are too cheap, and they should really cost about $100 to reflect the precious nature of the gas they contain.

That will be the day all the party stores start selling their Helium reserves to NASA.

Everything at my office is named after Simpsons characters. We have Krusty, CrazyCatLady, DrNick, McBain, SideShowBob, etc...