How can I perform calculations on my form?

Hello 

Desperately need your help! I created my form for members to register and choose the courses they wish to attend with the cost, plus misc items. How would you recommend I proceed? Right now, I have one condition on the form which calculates cost of t-shirts - but I need a form total based on all the selections.

One more thing - I tested the form by clicking on some of the courses, but was unable as a 'user' to uncheck if I changed my mind. Did I do something wrong?

Thank you for your help!!!

I have checked your form and I can see you're using radio buttons, do note that once an option has been selected you cannot remove the selection, if you would like to allow your users to uncheck an option then you would need to switch to check boxes. 

You could also assign calculation values to each option, this guide will help you doing that: https://www.jotform.com/help/301-How-to-Assign-Calculation-Value 

Then with the Form Calculation widget you will be able to perform all the calculations on your form and get the total value, here's a guide about it: https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget 

If you need to pass the calculated amount to a payment field then you could take a look on this guide that will help doing it: https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field 

If you have any question, please let us know.