Got a fat wallet but suck at math? Then hide your embarrassment from your pals with the Credit Card Calculator created by world-renowned industrial designer Sam Hecht. The solar powered calculator looks and feels like an ordinary credit card but has embossed numbers, and instead of a magnetic strip, a digital display with solar panels is placed instead. Now you can keep your fat wallet as it is without having to shell out unnecessary cash caused by mental math malfunction. $6.
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