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2016-08-15 12:00:12 +0100 received badge  Popular Question (source)
2016-08-13 19:48:05 +0100 asked a question Somme colum A when something is in colum B

I have two colum, the first one have number on it and the second one have some cell filled.

how could i do a conditional somme instruction for calculating only number that have a corespondiong not empty cell?

Had not found how to do that complexe function :(