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all you have to do is keep a mental, running inventory of what change you posses at any given time and use that inventory to plan how to pay for items to keep holding them at a minimum!
Yes, in our idiocracy, remembering you have three quarters and two one dollar coins is
soooo difficult to remember.

I am not buying it. Like anything else, the more you do it, the more automatic it becomes. I do not even think about it, I just
know what I have available. Even if one does not remember the exact coins in their pocket, doing it right means having less than a palm of change, which is easy to scan for what can be used. It is not rocket science, it is not even elementary science, it is basic math.
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Joe U.S. Public: You've got to be kidding me! I can't even make change without a calculator! Is there an iPhone app for that?
Our debating is moot. Plastic will win in the end
[1].
