Assuming your data withe headers is in Sheet1:A1:F999
Summary in sheet2 has date Column heders and Classification Row headers
Sheet2 has dummy column header in col A

=SUMPRODUCT((Sheet1!$A$2:$A$999<=B$1)*(Sheet1!$A$2 :$A$999A$1)*(Sheet1!$C$2:
$C$999=$A2)*(Sheet1!$E$2:$E$999-Sheet1!$D$2:$D$999))

See example: http://cjoint.com/?ejkq1bSSPG

HTH
--
AP



"Alex" a écrit dans le message de
...
In 1 sheet I have an account register as it appears in a checkbook:
Date, Payee, Classification, Debit, Credit, Balance

In sheet 2 I have columns designated as pay days which is every 2 weeks
and
rows designated Classification. The classifications available in sheet 1
are
derived from the row titles in sheet 2 so they are identical.

I want the sum of each transaction for each Classification falling within
the applicable 2 week period in sheet 2 from sheet 1.

I can summarize the Classifications on a monthly basis using SUMIF but I
haven't figured out how to gather data from within a range of dates. I
haven't figured out how to use SUMPRODUCT either, if that is in fact the
correct function to use.

Please help.

Thanks,
Alex