Thread:Project:Support desk/poll/rating extension that produces an average number

I want to have a poll/rating extension that allows a user to input any number and the poll spits out the average of all user inputs. This is for deciding on how much people think an item is worth, and a number of stars or a percentage rating as with all the extensions I have found, wont cut it. Especially as the values rage from a few dollars to possibly a few thousand.

I found math extensions that give you an average numbers, and various form extensions that create forms... I imagine these things could be put together somehow. But I'm not figuring it out...