262808 attribute cange in osc

Hi, I am looking for either a contribution or a fresh osc install which will allow oscommerce to calculate the cost of a product on the fly in the product section by using the atributes. The product will start off at £0.00 and I want the customer to select the attributes they need, size, quantity, colour etc which all have extra costs involved. As the customer selects these, the price is calculated on the fly and is displayed on the products page. Once the customer is happy they then add all that info to the shopping basket and keeps on shopping.