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Krishna Mohan
 
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Default formula to calculate the average of a range basing on condition

Hi,
I have a situation like this below..
18-Feb-02 02-Jun-04
26-Jul-02 08-Jun-04
29-Jul-03 10-Jun-04
22-Oct-03 05-Jun-04
01-Nov-03 10-Jun-04
11-Nov-03 14-Jun-04
18-Nov-03 04-Jun-04
20-Dec-03 21-May-04
30-Mar-04 10-Jun-04
08-May-04 22-Jun-04
29-May-04 15-Aug-04


11-Jun-04 11-Jul-04
12-Jun-04 16-Jun-04
22-Jun-04 28-Jun-04
24-Jun-04 26-Jun-04

10-Dec-04 23-Dec-04



28-Aug-04 01-Sep-04
28-Sep-04 29-Sep-04
08-Dec-04 22-Dec-04

20-Aug-04 29-Aug-04

25-Aug-04 31-Aug-04
30-Aug-04 10-Sep-04
03-Jan-05 10-Jan-05
27-Sep-04 05-Oct-04
30-Sep-04 07-Oct-04
03-Oct-04 04-Oct-04

The above are two columns of excel. I want to calculate the average of the
difference for each month in another work sheet like bwlow

Month Difference..

Can some one help me on how I can do that
 
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