title: Need to edit wp simple paypal cart to update price based on drop down option
body: <p>I am using the <a href="http://www.tipsandtricks-hq.com/ecommerce/simple-wp-shopping-cart-installation-usage-290" rel="nofollow">wp simple paypal cart</a> for my site.  I know you can do say [wp_cart:Demo Product 1:price:15:var1[Size|Small|Medium|Large]:end] to get a drop down of options when adding to the cart, but I want the price to be updated depending on what option I choose.  I am quite handy with php so I would be comfortable getting the values and updating the $price variable, but I can't really see where the options are in the wp-shopping-cart.php file to add name values to them.</p>
  
  <p>So has anyone else had any luck with editing it to update the price based on options chosen in the dropdown?</p>