I need an on the fly price calculator for the oscommerce shopping cart. The store is a custom made blind company that requires the user to input the height and width of the blind that they would like in text and the calculator works out the price on the fly. Other attributes will be added to the product which will also need to be added up. AJAX would be the preferred method. If you take a look at [url removed, login to view] and see their cart you will see what I mean.
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I have been working as a systems developer for the last 13 years, specialising in web-based application development for the last 5 years. I am happy to develop in any preferred language using AJAX if preferred.