Count two columns when criteria is met 1

[Bill4tektips]

I'm sure I have done this before but it was a long time ago. I need to count the data in two columns of a spreadsheet so that if the data in column D is a specific letter, say "P" and if the data in column I is "Sep-07" then show 1 for each entry where criteria matches.
What I have so far is:
=IF('Change History'!$D$2:$D$500="P",IF('Change History'!$I$2:$I$500="Sep-07",1,0))
but I am probably totally wrong as it's years since I did this. Can anyone put me right?

 

[xlbo]

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Rgds, Geoff

We could learn a lot from crayons. Some are sharp, some are pretty and some are dull. Some have weird names and all are different colours but they all live in the same box.

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