Not sure this relates to this plugin at all.

I'm looking for something that will let visitors click a button, input a number and that add to a counter. We are in the midst of a promotional drive where our users will be giving away materials to people and they need to tell us how much they gave away. We want them to easily be able to come to the site, click on that button, input how many they gave away, and blam, done, and it adds to the total tally.

Any ideas?