Hello CAECAROL,
Welcome to Wikipedia, and thank you very much for your contribution to the Big Mac Index article! I've taken the liberty of moving it to the article talk page for now, and I hope you'll forgive me for that. I think your comment on the creation of the index is very relevant, but it might not be quite ready for prime time yet. On Wikipedia, we try to make everything fit with both the Manual of Style and the rest of the article, and I think your comment would benefit more from being incorporated in the main article. I'll try my best to find the time and give you a hand, but feel free to start the work yourself - you know where the edit link is. :-) Also, feel free to play around with the formatting of your bit in the Sandbox and don't be afraid to mess anything up, we can always revert that.
If you have any questions at all, drop me a line on my talk page.