Formula to sum every 4th cell returns #DIV/0! error in some column
I use this formula to sum the values in every fourth cell in colums
=SUMPRODUCT((MOD(ROW(E7:E190),4)=3)*(E7:E190)). This works in about half of
the colums, but returns the error #DIV/0! in the other colums. I do not get
why I get the error only some of the time.
What causes this and how do I correct it?
Thanks
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Brent
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