Related Clues:

• Wallet fatteners
• The ten in a sawbuck
• Jukebox inserts
• Wad builders
• Request to a teller
• Low notes
• Bills from tills
• There are two in eleven
• Change for $5
• Vending machine bills
• Tip jar fillers, mostly
• Some vending machine inserts
• Bills not found in ATMs
• Possible binary digits
• Change machine inserts