{"number":"INV-0001","date":"2026-10-18","due":"2026-11-17",
 "from":{"name":"Kirk Davies Studio","address":"Ottawa, ON"},
 "to":{"name":"Example Client Inc. (sample data)","address":"123 Sample St, Ottawa, ON"},
 "items":[["Python data-cleanup script",1,250.00],["Web scraper setup & CSV export",1,400.00],["Revisions (hourly)",2,60.00]],
 "tax_rate":0.13,"tax_label":"HST (13%)"}