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Learn how to use basic Formulas for mathematical operations & insert Functions like sum, average, count, max, min, date, time, etc. in Excel.

Excel’s BYCOL() and BYROW() functions evaluate data across columns and rows, returning an array result set allowing you to bypass a lot of work.

You can't use a SUM() function to sum a filtered list, unless you intend to evaluate hidden and unhidden values. Here's how to sum only the values that meet your filter's criteria.