Fictional editorial exercise. Keep answer files separate from inputs. A download does not establish a successful task.

There are two sheets: Orders and Notes. Import stale-cache.xlsx directly into Excel to CSV before opening/saving it in a recalculating spreadsheet application: expect Amount20/24/TOTAL44. Inputs3×10+2×12 independently give54. D2 andD4 caches were deliberately changed; formula text stayed unchanged. missing-cache.xlsx removes only those2 caches: expect blank/24/blank, never0. A capable spreadsheet program may recalculate as soon as you open the file. Save a recalculated copy and export again; check30/24/54 and both CSVs. checked-reference.xlsx is a calculated reference fixture, not evidence that desktop Excel was run. Total row is separate from2 detail rows.
