See attached sheet
Need your help again
I want the Nr in Column A be filed sequential but only if Column E has a value of 1
If Column E is another value then 1 (for example "adv" or 0) then Column A
should stay Empty.
I hope the example is clear
Ps: Just for my understanding, can you please first give me a hint on how to solve this on my own, instead of ready made solution.
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