Continuity mistake: At the end, while Hogan and Klink are talking, Hogan's right arm alternates between being up with a note in hand to down at his side between shots.
Continuity mistake: As Newkirk says he volunteers, he straightens to attention, hands by his sides. A second later, his hands are in front" holding a bit of laundry.
Answer: It's a comedy, not a documentary.
stiiggy
Perhaps it was counterfeit. There are numerous episodes where they deal in counterfeit monies.