Custom price updated on detail based on options and size select list


Jason Byrnes,
I am wondering if you still offer this premium service where the price in the detail page changes based on the customers selecting a larger size or other various options. I have a project nearing completion that could use this elegant little feature. I have managed to code the shopping cart to display just a single price for each item by combining the "sizePriceInc" and the "optionsPriceInc" to the DisplayInfo("Price:) with the following code:
<?php echo WA_eCart_DisplayMoney($eCart1, $eCart1->DisplayInfo("Price") + ($eCart1->DisplayInfo("optionsPriceInc") + ($eCart1->DisplayInfo("sizePriceInc")))); ?>
With the above code there is no need to create a separate Size or Options column. I was able to include the size and options information next to the product name and description in the shopping cart. However, I am still in need for someone to create the custom Ajax functionality to update the price on the detail page. Please let me know how I can go about getting this done.