I went to the bank today to get a certified check for an apartment I'm about to lease (will report back with pics once it finally goes through). There was an older woman cashing a check at the teller...she wanted $870 in 10s. She kept explaining to the teller how she should get a roll of 10s which is worth $1000 and subtract 13 10s and give her 87 10s. The older woman said this to the teller several times...The teller, of course, knew how to subtract. I'm not sure I would have the patience to be a teller - they get a lot of strange requests.