Thanks Max. I actually figured it out just before your reply came through; I
did it with the first option you listed.

I have a much harder one I am trying to figure out now. I have figured out
the formula to get the sum from 31 sheets on to a summary
sheet at the end of the Excel book; EX: =SUM(1:31!J3:J8). However, I now need
to know how to do it with an exception. Ex: I need =SUM(1:31!P3:P8) BUT ONLY
IF THE FIGURES IN P3:P8 ARE POSITIVE.
Then I need, for another cell, =SUM(1:31!P3:P8) BUT ONLY IF FIGURES IN P3:P8
ARE NEGATIVE.

"Max" wrote:

"Eric" wrote:
I am trying to get sum in G9 using G3 x D3 + G5 x D5 + G7 x D7.

One of these options in G9 should do it:
1. Simplest: =SUM(G3*D3,G5*D5,G7*D7)
2. If intervening cells are blank: =SUMPRODUCT(D3:D7,G3:G7)
3. If intervening cells need to be skipped:
=SUMPRODUCT(--(MOD(ROW(D3:D7),2)=1)*D3:D7*G3:G7)
--
Max
Singapore
http://savefile.com/projects/236895
xdemechanik
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