Include unique paid, nonvoid, known-amount invoices dated 2026-09-01 inclusive to 2026-10-01 exclusive. Match vendor+invoice number+currency for duplicate candidates, then verify amount/date; conflicting keys need human review. Retain originals and sources. Total currencies separately without FX. Keep unpaid, unknown, void and out-of-period queues. Escape formula-like CSV text; write spreadsheet values as raw text.