Customers

Bought and revenue are Σ qty × price over the Sales sheet's order lines, computed on every read and stored nowhere (§3.3). Type, industry, region, city, sales area and tier are columns on customer since 0002_workbook; the source's own word for each is still in the import archive and is what the cells print. There is no country column: the region is domestic. Select a row for the record, or open it for the full customer page.