A spreadsheet question may be asking for an explanation, a calculation, or the latest business record. Those are different tasks. Retrieving a passage about a workbook does not prove that a numeric answer was calculated correctly. Route arithmetic through an explicit calculation path, with the source version, selected range, formulas, and assumptions recorded. Test hidden rows, units, date boundaries, and workbook structure. Ask another person to reproduce the result from the same inputs. Keep the first workflow narrow and show the evidence behind the number. Use narrative retrieval for explanations, and a reproducible method for calculations that affect a business decision. Original article explainer. AI-assisted conceptual illustration and neural narration; original synthesized music. Not a human recording or customer result.