Look at the envelope containing U$S 400.000 in two packs. It appears to contain one thousand dollar bills.

However, when Marion Crane pays for the used car she gives away four of them. The sum requested was four hundred dollars, and she merrily gave away four thousand.

On top of it, if the envelope contained one hundred dollar bills, they could not possibly be put into a legal size envelope without disrupting it. Nor could two thousand bills divided into two piles fit inside a doubled newspaper. I encourage you to try.