My system allows users to add both one-time paid products and subscription-based services to a shopping cart. Is there a way to process such a scenario using PayPal's PHP SDK? I know how to process multiple items (attached to a Transaction via an ItemList instance) and Plans via Agreements, but I don't know if it's possible to do this in one PayPal call, without having to redirect the user to PayPal twice (once to the \PayPal\Api\Payment() approval link, and once to the \PayPal\Api\Agreement() one)? Thanks!
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