The whole of December 1998. 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: 1998-12-01, 1998-12-02, 1998-12-03, 1998-12-04, 1998-12-05, 1998-12-06, 1998-12-07, 1998-12-08, 1998-12-09, 1998-12-10, 1998-12-11, 1998-12-12, 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.