Sales figures for one merchant over a date range: a period summary,
a per-ticket-type breakdown, and a daily breakdown, selectable via
scope.

date_basis picks the date axis. The default, visit, groups both
sales and refunds by the ticket's visit date, answering "how many
tickets are valid per visit day, net of refunds"; rows for future
visit dates keep changing until the day has passed. Tickets without
a fixed visit date (open-date tickets) are excluded from the visit
basis entirely — they appear only on the transaction basis, so the
two bases' totals can differ. Visit-basis figures are refreshed
every three hours and may lag the transaction basis by up to three
hours. transaction groups by when things happened: sales on the
sale date, refunds on the day they were processed — a closed
period's figures never change; every ticket has a sale date, so
nothing is excluded.