the Olympic symbol

economy - How much are the Beijing Olympics going to cost?

I'm working on a smallish article on the 2008 Beijing Olympics and there is this very obvious question I try to answer: how much is the event going to cost? Even the Wikipedia, that answered many of my questions, is not dealing with that issue.
I have seen very different figures, figures that obvious go up as the years pass and depend very much on what you include and what not. But if somebody would have a tiny bit trustworthy figure, I would be obliged.