Solution
The following actions may waste ink even if you don't print, which results in extra paper left over.
Pulling on the ink sheet.
Canceling print in progress.
Repeatedly turning the printer's power on / off without printing.
(The printer initialization consumes ink. There may not be enough ink left for the allotted sheets in the set.)
Caution
When the paper runs out while printing multiple copies, do not remove the [ink cassette], but only the [paper cassette], and then refill the paper cassette. Pulling out the [ink cassette] while printing will consume the [ink sheet].