Hi,

Per code below supplied by Max in post dated 1/1/09 "Calculating the sum of
different categories over a given time period", I need a slight variation
that I can't seem to figure out.

=SUMPRODUCT((TEXT(B2:B1000,"mmmyy")="Dec08")*(A2:A 1000="Product
A"),C2:C1000)

I have a date field and a product field, but I also have two columns for
sales amounts. If column O = cc, I want to total column J (revised sales
amount). If column O < cc, I want to total column I (sales amount). How
do accommodate for this with sumproduct?

Thanks in advance for any help.

Pam