(Solved) – Assign number to a row based on a cell value


I have something like this


I’d like to assign a value (1,2,3,…) to the third column based on the other columns. For example, the value 1 would be assigne to the first row of each group in the second column to end up like this


I’ve tried with AutoFill and DataSeries but I can’t manage, tahnks for your help!

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