can i add items to be sold?

i was hoping to set this up as an event registration with 2 items to be purchased and paid for at one time.

I created a demo for you to view:
https://form.jotformpro.com/72284378304964

You can clone this URL:

How to Clone an Existing Form from a URL

I used the standard PayPal payment integration. You can read about how to do this yourself:

How to Integrate Form with Paypal