How to use results from two froms?

Good Day, I am not sure if you calculator can do what I require so I am asking for help and guidance, the link shown above is the page I built using another plugin and based on this original working sample: Online Debt Calculator | Debt Review Calculator | Debt Rescue.
Is it possible to have two calculatores and use the results from each in a separate calculation.

The page I need help with: [log in to see the link]