Suppressed amount is included in Running Total

Dear Everyone,

I am doing report for vatable amount.

In my report, withholding tax for 1% and 5% is separated, my problem is when it generates and both 1% and 5% has value, it generates to rows with the same value except for the withholding tax.

I have created a formula in "suppress" to eliminate the double amount in vat and other amount value details.

{INV5.WTCode} = "CW5"

it does suppress the amount, but the problem is that the running total is including the suppressed amount.

What should I do to make the running total not to include the suppressed amount.

I read a discussion with similar case and tried going thru it but I am a bit confused.

Can some help me please.

thanks,