Why not use a pivot table? Put the Month as a page field or row field, put
the Client as a row field, and put the Amt as the data field.

If you don't want to use a pivot table, you will have to set up a separate
formula for each combination of criteria:

=SUMPRODUCT(--(A2:A5="Jul"),--(B2:B5="Smith"),C2:C5)
=SUMPRODUCT(--(A2:A5="Aug"),--(B2:B5="Smith"),C2:C5) etc.

Hope this helps,

Hutch

"sofia" wrote:

I am trying to sum amounts based on meeting multiple criteria in other
colums. I saw the response to the "contruction guy" posted here, but it does
not work for my information?

Month Client Amt
Jul Smith 5
Jul Smith 2
Aug Smith 3
Aug Scott 10

I want to calculate total amount per client each month using "sum" and "if"
statements.

Thank you,

sofia