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Excel Magic Trick 297.5: Conditional Sum for Varying Columns

Learn with formula is best from amongst five different formulas for conditionally summing from varying columns:
1.OFFSET formula
2.INDIRECT formula
3.SUMPRODUCT with multiplication and different sized ranges
4.SUMPRODUCT and INDEX function
5.SUMIFS and INDEX function.
We will see that the versions that use INDIRECT with a zero in the row_num are fastest in calculating.

Also see how data that is setup as a table / list / database is easier to analyze that data that is not in a database setup.

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