Shipping being added too many times
I have got a paypal add to cart working, and I have three shipping costs depending upon where the customer lives. I have UK, Europe and Rest of the world. These shipping prices are automatically set by the database when the customer logs in. This all works fine.
My issue is that if the customer buys more than one item, the shipping cost is added twice. I need the shipping cost to be added only once. How do I do this? I understand that there is a flat rate shipping facility within paypal itself, but that flat rate needs to be fed from my database. Is there a way of doing this?