Are payment costs included in the monthly price? Otherwise, what is the pricing for PayPal vs Stripe ? Thank you.

If you're referring to the Payment Processors you can use on your form (e.g. Stripe, Paypal, etc.) then there's no added charge for those transactions.

The only thing you'd pay for with JotForm are the subscription plans and that will only happen if you decide to upgrade.

In case we misunderstood your question, just get back to us with a bit more info and a clearer description of what you're trying to do so we can better assist you.