Try this:

=IF(SUMPRODUCT(--(O5:O20O22-4*D3))0,"BAD DATA",0)
--
HTH,

RD

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"John Sofillas" wrote in message
...
Hi,
The formula below works the way I want it to for cell O5. How can I
open this formula up for a range of cells O5:O20?

=IF(O5(O22-4*D3),"Bad Data",0)

As always, much appreciated for the advise!