Learn how to calculate Weighted Average in Excel with percentages using the SUM function and the SUMPRODUCT function.

Learn how to calculate moving averages in Excel using dynamic arrays. Simplify rolling totals with custom functions for efficient analysis.

At the sheet level, conditional running totals require focused expressions, but an Excel PivotTable requires only a few field swaps. Susan Harkins shows you how.

Sometimes you just want to tell Excel what it is you want your formula to do. It'd be a lot easier if you could just say "sort this data in ascending order and find its average" i ...