Adding a total to Crystal Report converted from PLD

Hi,

Using SAP 8.82 PL 6 with Crytal Designer 2008.

There is a Trial Balance system report called "Periodic Trial Balance Sheet - CR (CA) (System)" which is a conversion from PLD.

I need to addd a total at the bottom below the 'balance' column for only accounts from P&L drawers i.e. Revenue onwards. I built a formula in detail section as follows:

IF ToNumber(LEFT({PLD__ITEMS.F_136},1)) IN [4,5,6,7,8]

THEN {PLD__ITEMS.F_139f}

ELSE 0

and then totalled this field at bottom, but it does not work.

I need help either making this work or any other easier way to get what I need.

Thanks,

Ajay Audich