Related Clues:

• Cash-register compartment
• Legal tender
• Counting intervals, perhaps
• Wallet residents, perhaps
• A lot of binary code
• Register section
• Money in Mexico
• Rightmost column, typically
• Low scores
• Teller's pile
• Keys with exclamation points
• Counting intervals, e.g.
• Change for a sawbuck
• Low notes?
• Change parts?