Double Dash In Sumproduct Formulas
Click on an empty cell (1), and type in =SUMPRODUCT(–(D4:D8=”South”);E4:E8) – SUMPRODUCT(–(D4:D8=”South”);F4:F8) (2).
Note: We’d subtract expenses from revenue for only South. How you use the SUMPRODUCT with double dash lies on what you would like the formula to obtain from the whole data.
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Further reading: Basic concepts Getting started with Excel Cell References