My site is using a custom shopping cart, so I'm using the HTML variables explained on this documentation page. It's mostly going well, but I have a few questions: Is it possible to use the business ID rather than an email associated with the business? (Not a huge deal, I just don't like having email addresses out there for scrapers and such.) Is it possible to pass notes for an item? For example, someone orders item_name "T-shirt" and has specified in the shopping cart (saved as a string) that they want it in size small, the color red. Is there a way to pass that? I don't want them to have to make a choice at PayPal which is what the on_/os_ variables appear to be, or am I misunderstanding them? Let's say shipping for all orders is $5 no matter what. Can you set shipping for an entire order? It appears you can override tax, but I don't see an option for shipping. The way I have it set now is to set shipping_1 = 5.00 and no shipping for any subsequent items, but that feels kind of inaccurate. Thank you!
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