Averages For Last 12 Entries

Oct 20, 2008

I need to calculate average for last 12 valid entries in a column. I say valid because if there are blanks or zeros in the cell they need to be discounted.

The solution needs to work on percentages as well.

To explain further
Col A Col B
Jan 2007 1
Feb 2007 5
Mar 2007 5
Apr 2007 0
May 2007
Jun 2007 20
Jul 2007 0
Aug 2007
Sep 2007 10
Oct 2007 0
Nov 2007 10
Dec 2007 18
Jan 2008 8
Feb 2008 6
Mar 2008 0
Apr 2008
May 2008 10
Jun 2008 1

The requirement would be to calculate average from Jun 2008 backwards for 12 months where there aren't zero or blank entries.

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Jan 13, 2009

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Here is our latetest attempt, WITHOUT THE OFFSET.
The data is in Column P and Column N

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Apr 17, 2007

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MSN: 123,234..................................8.9

Total: 14,689,913............................???


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http://www.excelforum.com//attachmen...1&d=1165960332

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[Code]...

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