How to modify the price in our product options?

Hi, I cloned our association's registration form and need to modify the prices to reflect late fees. The form is here https://form.jotform.us/70887703810157 The price field in the payment options is greyed out and cannot be modified. Please advise.

The initial product cost is greyed out for those products due to having special pricing enabled:

You can edit the special pricing options for your product under that options menu:

Or you can remove the special pricing for your products and the main price will no longer be greyed out. 

Thank you that worked! I just noticed that it's possible to choose all 3 of the payment options. Is there a way to toggle off a previous selection if a user decides to change their payment? In other words if I choose option 2 and then realize I should have chosen option 1 and I click on option 1 both options are selected. Could the choosing of option 1 automatically turn off option 2?

Here is how you can set so your users can select only one product at the time:

So you have to switch the Multiple products option off.

If you have any further questions or had something else in mind, please let us know.

Thank you!