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Calcularia（一个虚构的国家） has not yet adopted a decimal system（十进制） of currency.It still uses three monetary（货币的） units,something like Britain's former pounds,shillings,and pence----but in Calcularia the three units are called Sums,Bits,and Pieces.
Here as an example is a copy of a cash-register slip for some items a friend of mine brought back from a recent trip:
Sums Bits Pieces
3 7 5
2 13 7
7 6 7
8 11 6
TOTAL 22 12 1
I know the addition looks all wrong,but I am assured that the cash register really did add up the prices correctly.Can you tell how many Pieces to a Bits,and how many Bits to a Sum there are in Calcularia?
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