Workflow to trigger when ANY user unpit field is changed in a form

Workflow to trigger when ANY user unpit field is changed in a form

Hi,

I would like to see a form recalculate formulas ON SCREEN whenever a user changes ANY ONE of a group of specific field numeric input on the form. I would like the funtionality similar to the "on submission" result, but be able to see the change on the screen before submission and as the user changes values on any of the field.

How can this be done in Deluge?  ie detect change in ANY of the input fields to trigger an action to recalculate all formulas of the form?