Sum select cells based on date range

[Chad]

Here's the table I have

Date # Days Open
02/01/2008 3
02/01/2008 2
02/05/2008 3
02/11/2008 1
02/11/2008 1
02/12/2008 14
02/15/2008 8
02/18/2008 2
02/18/2008 4
02/20/2008 4
02/21/2008 15
02/22/2008 1
02/26/2008 4
02/27/2008 9
02/27/2008 8
02/29/2008 1
02/29/2008 13

Date is manually input, # days open is calced using networkdays and another
manually input date.

Out of this table, I can count how many items fall within a date range based
using sumproduct. What I need to be able to do is sum the days that
fallwithin a date range. For example, the first date range is 02/01/2008 to
02/10/2008. I know there are 3 items there, but I want to add up the 3, 2,
and 3 for that range.

I have cell references indicating the date range I wish to use. What would
I add on to this formula to sumup the # days open for the given date range?
I'm using the formula =SUMPRODUCT((J9:J26>=AM102)*(J9:J26<=AM103)) to
determine the # of items in the date range (date ranges in col AM). I should
come up with 8 for the date range of 02/01/2008 to 02/10/2008.

Thanks in advance for any help.

 

[PCLIVE]

I prefer my SUMPRODUCTs this way.

=SUMPRODUCT(--(J9:J26>=AM102),--(J9:J26<=AM103),K9:K26)

HTH,
Paul

 

[Chad]

Thanks! worked like a charm!

I prefer my SUMPRODUCTs this way.

=SUMPRODUCT(--(J9:J26>=AM102),--(J9:J26<=AM103),K9:K26)

HTH,
Paul