Payment question on my form

In the one form I have. I want to be able the people to click which camp they want to attend. Some people might just click one item.  There is different pricing if you were to select a another number of camps.  How do I get where they can select what they want and then it go to paypal and they can pay and come back and submit the form. This is the part I need to get right. 

https://www.jotform.com/build/90767773133161

Right now when I try to do it, there is a payment error.  I need to get this working ASAP. 

https://form.jotform.com/90767773133161

I am not sure if I have understood your question correctly. I did check your form and found that you have added PayPal checkout payment tool which you have not configured yet.

You seems to have added regular form fields to list all the Camp. I would suggest you to please delete the PayPal checkout payment tool you have added and then add Paypal payment tool. You can then perform calculation in form using "Form Calculation" widget and pass the amount to PayPal payment tool. You may like to take a look at the following guide which should help you: 

Perform calculation in form:  https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget 

Pass calculated amount to payment tool:  https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field  

Hope this helps.

Do get back to us if you have any questions.