I am working with a multi-tabbed workbook (each tab is monthly). For the quarterly tab, I need to count the number of users in from Jan, Feb and Mar that use a specific piece of equipment. If the user uses it 4x in Jan, 3x in Feb and 10x in Mar, the user should only be counted once rather than 17.
Is it possible to count unique values across multiple sheets in a workbook?
Thank you.
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