Assume your values are in the range A1:A10, B1:B10 and C1:C10:

=SUMPRODUCT(--(A1:A10="03"),--(B1:B10="S"),C1:C10)
--
Regards,
Dave


"GateKeeper" wrote:

I have a table like this:

Column_A Column_B Column_C
03 S 100
03 T 100
02 S 100
02 T 100
04 S 100
04 T 100

I want to sum the cells in C only when A="03" and B="S". In this case, I
would expect the total to be 100.