Duplicates values Elimination using context operators

Hi All,

I am facing the below issue.

IC_CODE      IC_C_CODE   LN           AMOUNT     TN_NO

21                    10                     234          1000              101

21                    10                     234          1000               102

21                    10                     232          500                 102

21                    11                     230           2000              103

21                    11                     230           2000               104

my o/p should look like this.

IC_CODE     IC_C_CODE   AMOUNT

21                    10                     2500

21                    11                    4000

I have created a variable TOTAL_SUM -> =Sum(Amount ForAll([LN]) In(IC_C_Code])) but i am getting multivalue error because of duplicate LN number.

Any help is grealty appreciated.

Thanks in Advance!!

Thanks,

Reacha