Create a type
hidden input with the name
price_id with the value set your Stripe Price ID. See the example below.
<input name="price_id" type="hidden" value="price_1234567890abcdef"></input>
Add multiple price_ids to be combined at checkout by comma separating the items. This is perfect for upsells, bundles, and one-time fees at sign up.
<input name="price_id" type="hidden" value="price_1234567890abcdef, price_0987654321abcdef"></input>