SumProduct over sets of cells (not contiguous)

Posted by Craig on Stack Overflow See other posts from Stack Overflow or by Craig
Published on 2010-03-09T23:00:41Z Indexed on 2010/03/12 22:57 UTC
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I have a total data set that is for 4 different groupings. One of the values is the average time, the other is count. For the Total I have to multiply these and then divide by the total of the count. Currently I use:

=SUM(D32*D2,D94*D64,D156*D126,D218*D188)/SUM(D32,D94,D156,D218)

I would rather use a SumProduct if I can to make it more readable. I tried to do:

=SUMPRODUCT((D2,D64,D126,D188),(D32,D94,D156,D218))/SUM(D32,94,D156,D218)

But as you can tell by my posting here, that did not work. Is there a way to do SumProduct like I want?

Thoughts, Answers, Questions, Comments?
Craig

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