Excel validation lists avoid blanks and errors with TOCOL(ignore) plus FILTER; the spill range stays stable across worksheets.
How-To Geek on MSN
How to use Power Query in Microsoft Excel
Transform messy spreadsheets, remove errors, and refresh tables automatically without writing a single formula.
How-To Geek on MSN
How to name Excel objects like a software dev
Transition from user to developer through consistent notation, table-based architecture, global constants, and self-documenting logic.
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