I'm trying to create a unique ID for documents. I would like to generate a unique number for each Category (in "Abv") but I'm struggling to not count the parent rows.
My current formula is: =SUM(COUNTIFS(Auto:Auto, <Auto@row, Abr:Abr, Abr@row) + COUNTIFS(Auto:Auto, Auto@row, Abr:Abr, Abr@row))
The formula abode had been in "Count" but was counting the green and bolded rows too (which are folders, not files). In the yellow box is manually keyed in how I'd like the formula to create the numbering so the "New Document #" column will produce a unique number that starts at 1 for each Category eg. "MO", "SE"