Passing values to the success screen on Forms

I am using a Form block to build a calculator. I was preventing the form to submit and show the calculated result on the form page before. I want to add an email address field to the calculator now and need the form to actually submitted.

My question is how I can carry the calculated output of the form to the success screen so I can both get the visitors email address and show them the output of their calculation.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)