How to Exclude Suppressed records amount from Sum

Hello,

I need your help in excluding the suppressed records amounts from the SUM in the group footer. In the details section, I am having duplicate deal nos and amounts.So, in the Section Expert for the details sections, I performed a condition on the formula "Suppress" to suppress the duplicated records which is:

{deal_no} = (next{deal_no})

The above condition is applied in the report and I was able to suppress the duplicates. Now in the group footer, I am performing a running total formulas using the formulas to calculate the SUM for the amounts. However, this SUM is calculating the suppressed amounts and it is giving the results. So how to remove them from the calculation.

I tried to use a running total, however, I can't do that because I am using a formula in the details for the amounts which is:

if group = "TERMS" Then {Table A.Amount} *27/{Table.Amount B} else {Table A.Amount} * 100/{@no.ofdays}

Thanks