I have created an excel spreadsheet with a link to a carbon footprint calculator. My spreadsheet takes user inputs to calculate miles per gallon savings and system purchase break even point in months. It then uses user input data from the carbon calculator to calculate estimated carbo footprint reduction. It seems all to work well on excel however I can't seem to post to my Savings [url removed, login to view] webpage. If it is not the proper format and someother format would be better let me know. I think for a few moments of your time is good for forty to fifty clams!! I will still keep trying on my own, I just need to get it to workonline and also look presentable.