Sum product formula with conditions
On 7/17/2019 11:34 AM, dpb wrote:
On 7/17/2019 9:46 AM, TIMOTHY wrote:
Thank you Alan & Rover
I have searched on google and found out the formula
I don't know who started this idiom of a double-negation operator
instead...but it's a least confusing to read if nothing else and seems
less efficient besides.
ERRATUM: The cast-to-numeric function is N(), not NUM(), sorry...