A bill changer is a dedicated vending machine that accepts bank notes and dispenses coins. In some cases the machine subtracts a small amount (e.g. 5 cents) as a surcharge for the transaction. In other cases no charge is made. This latter is particularly common where the merchant expects the coins to be used on the spot in other vending machines. Electronic bill changers are often found at laundromats, video arcades, and next to other vending machines, especially those that lack bill validators.
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