Is it possible to add values to options on the form?

I would like to put options to register for an event that will take place in two locations, so I would like to give user the option:

1.  Louisville Event

2.  Lexington Event

3.  Both Events

Once they choose 1, 2 or 3 - then I want to give them the option to pay by check or credit card.  Option 1 & 2 will have the same prices, but Option 3 will have different prices.  Can you tell me the best way to set up this form?

It's possible to achieve that, first you will need to list the options using either a single choice or multiple choice field, this will depend if you want to allow your user to choose more than one option or not. 

Both fields can be found under the quick elements: 

You can assign calculation values to the options on the fields, please check this guide for more details: https://www.jotform.com/help/301-How-to-Assign-Calculation-Value 

Also, this guide will help you performing the calculations on your form: https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget 

You may also ask to your user the payment method once they have selected an option, this can be done with the show/hide field conditions: https://www.jotform.com/help/316-How-to-Show-or-Hide-Fields-Base-on-User-s-Answer 

Here's an example: https://form.jotformpro.com/72685870657977 

Feel free to clone it: https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL 

I hope this helps.