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#1
October 27th, 2009, 04:45 PM
posted to microsoft.public.excel.misc
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Averaging values
Hello everyone:
Hoping someone can assist... I have a spreadsheet which reflects copier meter clicks as reported from 1'08 through current day. My salesperson is wanting to determine the 3rd qtr, 2008 vs. 3rd qtr 2009 average meter clicks. Each month contains a rolling total. For instance: Col H)-June '08 data= 118,992 Col I)-July '08 data= 129,406, so July meter clicks would be 10,414 Col J)-Aug '08 data= 136,904, so Aug meter clicks would be 7,498 Col K)-Sept '08 data=143,173, so Sept meter clicks would be 6,269 Col L)-3 month average would be: 24,181 The data continues through September '09, although in some months, there will not be a value, as the machine was removed. I tried calculating monthly differences just by inserting colums, but of course that gives me negative values if the unit was removed, and no meter read was provided. Any assistance you can provide would be greatly appreciated! TIA, Sandi 
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#2
October 27th, 2009, 06:20 PM
posted to microsoft.public.excel.misc
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Averaging values
=if(OR(H2=0,I2=0),"",I2-H2)
should get you there. If either current or previous month is 0, then leave it blank, thus avoiding including in the average. "RUSH2CROCHET" wrote: Hello everyone: Hoping someone can assist... I have a spreadsheet which reflects copier meter clicks as reported from 1'08 through current day. My salesperson is wanting to determine the 3rd qtr, 2008 vs. 3rd qtr 2009 average meter clicks. Each month contains a rolling total. For instance: Col H)-June '08 data= 118,992 Col I)-July '08 data= 129,406, so July meter clicks would be 10,414 Col J)-Aug '08 data= 136,904, so Aug meter clicks would be 7,498 Col K)-Sept '08 data=143,173, so Sept meter clicks would be 6,269 Col L)-3 month average would be: 24,181 The data continues through September '09, although in some months, there will not be a value, as the machine was removed. I tried calculating monthly differences just by inserting colums, but of course that gives me negative values if the unit was removed, and no meter read was provided. Any assistance you can provide would be greatly appreciated! TIA, Sandi
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