When you click 'buy now' on anything from the Pro Shop, WGT takes you to a screen to use existing credits or purchase WGT credits for the value of the item selected (the value can be changed).
Currently it will only allow you to select a single product before proceeding to purchase the item.
My suggestion is to have a shopping basket that would allow players to select multiple items before 'proceeding to checkout'. All selected items from the shopping basket would then be displayed with individual costs shown for each item and a total cost at the bottom.
It would make it easier for a player to work out how many credits to purchase with an automated list of all items they've selected.
The current way isn't too bad but this would just be an improvement on the transaction method.