Corrected entry: When Doc opens his case full of currency, it's sorted by decades, and Doc explains that it's purpose is to be ready for all monetary situations. He pulls some currency from the stack labeled 1950's and tells Marty to use it to buy some clothes. However, since the year they are in is 1955, there's a chance that he may be giving Marty money dated anywhere from 1956-1959. Wouldn't it have made more sense to take the currency from the stack labeled 1940's instead, thereby not running the risk of drawing attention to themselves with money printed with 'future' dates?
Sereenie
24th Dec 2003
Correction: Doc probably thought about that; his stack of money for the 50s is probably comprised of bills for the 40s, his stack for the 40s of bills from the 30s, and so on.
Sereenie