Unfortunately, according to the API docs there's not an easy way to purchase multiple items (i.e. shopping cart style): "
Multiple orders may be passed in a single request, but each request is transactional, so if an error occurs while creating one order, the remaining orders will be rolled back.
At this time, only a single item may be included in an order. Any additional items passed to this endpoint will be ignored without notification. "
Yet some sites do feature shopping carts, allowing for purchase of multiple items. I'm wondering how is this handled? Create multiple orders (resulting in multiple client credit card charges)? What about shipping and taxes - only apply to first order? Split them?
Your advice is very much appreciated. Thanks.