Weighted Average
 

I am new to the weighing of numbers using excel. I really need help.
I am able to do this manually, but I it takes too long. Yes I still
use the calculator instead of excel. I am new at this.
Please help. I need to figure out the Quaterly total of the Average
second.
Manualy, I divide the total of the month and divide it by quaterly
total then this number is the multiple by the months average second.
And I repeat for all months. I then add and this is where my 0:18 comes
from.
Please help if this makes sense.


Total Average
seconds
October 7,727 0:26
November 6,292 0:12
December 5,468 0:14
Quarterly Total 19,487 0:18


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phm
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