Excel validation lists avoid blanks and errors with TOCOL(ignore) plus FILTER; the spill range stays stable across worksheets.
Excel's basic formulas work fine for simple calculations, but they quickly become cumbersome when you're dealing with complex data analysis. You end up with nested functions that are hard to read, ...
Excel's ascending and descending sort options are powerful tools, but they won't always sort values in a familiar and meaningful way. When this is the case, you might need a custom sort. Sorting is a ...