magician wrote:Frankly, it was sad. I tried to tell her that it's the same thing ("You end up with my $100 bill, I end up with Gatorade and change.") but she was adamant: making change for a $100 is different from accepting the $100 for payment.
While the end result is the largely the same, she might have been confused how to manage the register to perform your simple 2-step workaround in one step without messing up paperwork (working a shift at midnight does not help cognitive function!). Maybe the register wouldn't have allowed a 100-bill given as payment, but clearly didn't care about a bill swap (I have no idea about register capabilities 35 years ago).
I wonder if the same transaction would work today, without some sort of alert (either during- or post-transaction register checks -- "Where did this $100 bill come from?").