Clarification of Net Payment and Gross Payment on Update Dividend page

It would be great to have a on-hover table popup which will show how Net Payment and Gross Payment is calculated. Current popup does not clarify how Navexa arrived to these numbers. The issue I have is that while Net Payment is matching with adivce note but Gross Payment is dramatically different. Likely something was entered incorrectly but it is hard to pinpoint what is wrong when way of calculation is not disclosed.