The Invoices Report lives under the Catering group's reports menu (/admin/reports/invoices) and lists custom-charge (invoice) line items from event proposals whose event date falls in the Begin–End range. Columns: Proposal (#id — name, linked), Name of the charge, Unit, Quantity, Amount and Total (amount × quantity), with a footer Total Proposal Invoices. You can download it as PDF or Excel. It's meant for reconciling what was invoiced on proposals for a period.