How does “Reading the totals” work on the Sales Invoices page?

The four figures at the top are for the period and filters in view, not for all time. Total Invoiced is after credit notes and says how much it took off; Outstanding is net of credit notes too; Overdue is a count of invoices past their due date. If the server could not total the list the tile shows a dash with the reason and Refresh retries — a zero would be a claim the page cannot back. Grouping the list adds a subtotal per band, which is the quickest way to see a customer's or a month's position. Where: Sales Invoices (/accounts/sales).