Question : Add only the positive numbers between a date range

Good Afternoon

I am looking to add together only the positive values held within the one column (Q), if the values are between 01/03/2010 00:00:00 and 31/03/2010 00:00:00, held in another column (L). So:

The date value is held within column L
The values to be added togther are in column Q

For example

Date                       Value
26/01/2010            1
01/03/2010            1
01/03/2010            -11
28/03/2010            2
01/04/2010            1

The answer I would be looking for is: 3. Is this possible?

Many thanks

Answer : Add only the positive numbers between a date range

Yes, try using the SUMPRODUCT formula:

=SUMPRODUCT((L1:L100>=DATE(2010,3,1))*(L1:L100<=DATE(2010,3,31))*(Q1:Q100>=0)*(Q1:Q100))

See attached example.

Book1.xls (13 KB)  (File Type Details) 

Example