Hi Melissa,
Thanks for getting in touch! Unfortunately, our Events Calendar PRO plugin does not include any support for integrating with e-commerce platforms such as WooCommerce–this is all managed by our premium ticketing solution, Event Tickets Plus. If you’re just looking for a simple PayPal-based solution without tickets, you might consider pairing one of our calendar plugins with a simple PayPal payment button placed in the event description! You can read more about how to create a PayPal button on PayPal’s documentation here. We also offer an option for disabling ticket emails from Event Tickets Plus if you’d just like to sell event admission without distributing paper tickets; the snippet for accomplishing this can be found here on our Knowledgebase.
I hope that helps! Thanks again, and let us know if you should have any other questions!