Write a spreadsheet formula for this calculation.
What I need:
- The calculation in plain language: {{e.g. sum column D for rows where the date in column A falls in the current month and column B says "paid"}}
- My sheet layout: {{which data is in which column, header row or not, roughly how many rows}}
- Tool and version: {{Excel 365, older Excel, or Google Sheets}}
- Known messiness in the data: {{e.g. blanks, text that looks like numbers, mixed date formats, trailing spaces — or "none that I know of"}}
Give me:
1. The formula, ready to paste, referencing my real columns.
2. A plain-language walkthrough of each part, so I can modify it later without coming back.
3. Where it will break: the two or three data conditions that would make this formula return a wrong answer silently, and what to check for each. A formula that errors loudly is safer than one that returns a plausible wrong number.
4. A quick verification: one manual spot-check I can do on a few rows to confirm the formula agrees with reality before I trust it across the whole sheet.
If my description is ambiguous about what should happen in an edge case (ties, blanks, duplicates), ask before writing the formula. Do not pick an interpretation silently.
If a newer function does this more simply than the classic approach (XLOOKUP vs. VLOOKUP, FILTER vs. array tricks), give the modern version and say which versions of the tool support it.excelgoogle-sheetsformulas