The whole of December 1999. Hand-entered orders are counted from every day in that range. Shop orders are counted from the 0 days that have been run — 31 days have not: 1999-12-01, 1999-12-02, 1999-12-03, 1999-12-04, 1999-12-05, 1999-12-06, 1999-12-07, 1999-12-08, 1999-12-09, 1999-12-10, 1999-12-11, 1999-12-12, and 19 more.

One page per customer: what to invoice them for, and what they have earned in delivery credit for hosting collections. Shop orders are paid at the checkout, so only hand-entered orders ticked “Invoiced” appear.