Validation of calculated fields in Adobe Sign template or web forms

Hello, 

I am struggling since couple fo days to solve simple problem with Adobe Sign Templates. We have to collect the nominee information from our employees in the document and it would be multiple table rows of text Inputs. The total sum of nominee proportion fields should be equals to 100%. Unfortunately there is no way to enable validation on calculated fields. We should stop users to sign and submit the document without  entering the proportion fields sum equal to 100%. Please let me know if anyone have ideas.