Invoice Balance formula

[Kima]

As a follow on to this question, if I want to know the value of the remaining balance on the partially paid invoice, what do I do?

Edit by mod:
This is a follow-up to this thread:
http://chandoo.org/forum/threads/al...payment-invoice-paid-invoice-paid-date.11800/

 

[Luke M]

Since you know how to calculate the amount paid, the balance would be
=SumOfInvoice - SumOfPaid