Try:
=IF(N3="","",N3*$O$1)

HTH
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"Darts via OfficeKB.com" <u19990@uwe a écrit dans le message de
news:5dd5917d4d79a@uwe...
Ok here is my formula

=IF(N3*$o$1="","",(N3*$o$1)

I copied the formula down it works as long as there is a value in say N3
if
there is a formula in the column the result is #Value!

I hope I am explaining this right.

thanks

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