=COUNTIF([Serial Number]$1:[Serial Number]@row, [Serial Number]@row)
I need to convert the formula above into a form that allows me to set it as a column formula.
=COUNTIF([Serial Number]:[Serial Number]@row, [Serial Number]@row) does not work.
Is there a work around for COUNTIF?
I was thinking I could write a similar formula with IF statements but can't figure it out.