How to have buyers select from either paypal/credit or check options?

I'd also like to know how to have buyers select from either paypal/credit card or pay by check.

I'd also like to know how to have buyers select from either PayPal/credit card.

For this purpose, you can integrate your form with PayPal Pro. Please check the guide below:

https://www.jotform.com/help/458-How-to-Integrate-Form-with-Paypal-Pro 

If you would like to sell your products or collect amounts and process the payment offline through check or wire transfer, use the Purchase Order option. Please check the guide below:

https://www.jotform.com/help/460-How-to-Create-Payment-Form-with-Purchase-Order

Let us know if you require any further information.