I tested the formula of Grah Guido and is working fine.
A have another question for the same file.
I am looking for a formula that sums the values except Sa en Su.
Everybody thanks for thelp
It is actually not working. I should have evaluated my formula, but being so pleased it seemed to work - wanted to do a Bosco trick, I should know better then that - I kinda rushed to publish. I apologize.
It just worked because of the merged cells. So it only evaluates "za".
Please do use the given alternatives that are correctly working.
So for the sum use
=SOMMEN.ALS(B7:AF7;B$5:AF$5;"<>za";B$5:AF$5;"<>zo")
I tested the formula of Grah Guido and is working fine.
A have another question for the same file.
I am looking for a formula that sums the values except Sa en Su.
Everybody thanks for thelp