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Excel formula and fix explainer

Get the right Excel formula for a task, with an explanation and a version for older Excel.

Microsoft Copilot Data analysisRuleStack original

Written for Microsoft Copilot (copilot.microsoft.com and app) · Updated 2026-10-17

Note: Review and test before use. Provided as is, without warranty. See Terms.

Prompt

In Excel, my data is in columns [A: date, B: region, C: sales] with headers in row 1, rows 2 to [500].
I need a formula that [task, e.g. sums sales for the region in F2 for the month in G2].
Give: the formula, a one-line explanation of each part, a version that works without dynamic arrays, and one common mistake to avoid.

Replace everything in [square brackets] with your own details.

Settings & parameters

Copilot chat; or Copilot in Excel with your file open if your plan includes it

Variations

Fix a formula that returns an error: paste it in.
Build a pivot-table plan instead.

Tips

Describe columns and header rows exactly.
Test on a copy of your file first.

More: all Microsoft Copilot prompts · all data analysis prompts · prompt library

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