How to show acumulate in table view form

Classic Servoy
1

Hi I want to show a form in table view mode that is a list of transactions.
Every record has a date, a concept, a credit amount and a debit amount.

I need to show in everyline the balance, acumulating all the records, just like:
Date Concept Debit Credit Balance
01-01-2011 Invoice 100 0 100
05-01-2011 Invoice 75 0 175
15-01-2011 Payment 50 125
20-01-2011 Payment 100 25
31-01-2011 Invoice 40 0 65
Totals 215 150 65

How can I put that balance field in the list?

Thanks in advance.

2

Have a look here: http://forum.servoy.com/viewtopic.php?f=3&t=15466