Google Charting Tools, ajax and maths expert needed

I need to construct a special calculator that is similar to a financial calculator and will involve charts. For this project I need either an individual or a team with the following skills (in order of importance): - experienced with Google Charting Tools or any other good charting tool library - experienced at ajax - familiar with mathematics Candidates with previous successful projects making calculators such as tax / financial calculators that display charts will be highly considered. Only candidates that have previous work to show me and demonstrate will be considered. No newbies, experienced bidders only. Only bid if you have the right type of previous work to show me.