Automated invoicing — from quote to follow-up

The classic small-business scenario: quotes in a spreadsheet, invoices made by hand, forgotten reminders. The workflow takes it all over: when a quote is accepted, the PDF invoice is generated with legal numbering, sent to the client, and logged for tracking. If unpaid by the due date, reminders go out automatically on day 7 and day 21, with escalation to the manager beyond that. It all relies on the tools already in place (Google Sheets, e-mail) — no new software to learn.