title: Paypal checkout - passing item, add only one shipping cost?
body: <p>The cart i built add one final shipping cost based on weight and volume of articles the customer is buying, called simply $shipping. I'm currently "Passing Individual Items to PayPal" (method 2 on the guide <a href="https://www.paypal.com/cgi-bin/webscr?cmd=p/pdn/howto_checkout-outside" rel="nofollow">https://www.paypal.com/cgi-bin/webscr?cmd=p/pdn/howto_checkout-outside</a>).</p>
  
  <p>The only 2 variables are shipping_x and shipping2_x which don't fit my purpose. I'd want to pass only ONE shipping cost (the value of $shipping variable of my cart), is there a way? </p>
  
  <p>I googled and searched it with no luck, thank you in advance</p>