The only deception here will be when the person at the register charges $1.00 per item instead of $0.9999 each. For 51 items, they'll be overcharging by a penny:
51 x $0.9999 = $50.9949 which correctly rounds to $50.99
51 x $1.00 = $51
I wonder if most cash registers can even handle four places after the decimal.
- Jason
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