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    That is it!
    I did not consider that case.
    Thank you!

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    Just a suggestion for those of you having trouble... A $50 bill does not equal two $25 bills. You have to think of each bill as a whole unit because you have an empty cash register, and can't make change until you're given it.

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    I think that your problem probably stems from the fact that you can also give change for a $100 bill in the form of one $50 bill and one $25 bill (instead of three $25 bills).

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    This comment is hidden because it contains spoiler information about the solution

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    This comment is hidden because it contains spoiler information about the solution