Can I use InDesign and Acrobat to make an invoice template that adds items and applies percentage?

Hi,

Pretty much what it says above. I'd like an invoice template with my brand design that I can add and remove items to that totals the right hand column of prices and adds a tax percentage to make a grand total at the bottom. 

I tried a script in InDesign that calculates table cells but it's a multi-step process and needs to be recalculated if a value is changed. 

I was pondering if this is possible with an interactive form fields and formulas after exporting to interactive PDF - anyone tried something similar?

thanks in advance