(Ok. US is 1 cent, 5, 10, 25, 50 (rare, no longer minted), and $1, and then bills for $1, $2 (also pretty rare), $5, $10, $20, $50, and $100. $20 bills are the most common larger bill, since they're what ATMs dispense. Just in case you were curious. Kinda fun having this other barely-related conversation.
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"Oh," I reply, blushing a little. "Would you really do that? Doesn't that mean less business for you?"