I've a stateless form to calculate prices.

I've created a button to calculate the price after user data submission.

The script only makes some simple fetching and a simple calculation like input.price=p1+p2+p3

I verify that through Debug Info all the steps are well done through all steps, but the field input.price does not show the result (it continues with zero).

For stateless forms in On Click action, is there any function to refresh/show/update or something the on screen fields in order to show the calculations results?

Thanks for your help