It is possible to perform calculation in Jotform sign document?

Hello, I have a document I'm making for a budget proposal. How can I make it to where the amount in the table is automatically calculated and put as a "total" at the bottom of the table?

Hi _fc_,

Thank you for reaching out to Jotform Support. Unfortunately, it is not possible to perform a calculation on Sign Builder because the features are limited compared to normal form builders. We can create a feature request about this and pass it to our relevant team. When or if it's implemented depends on their workload, how viable it is, and how many other users request it. 

Let us know if you have any other questions.