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100块呀~~~
197... wat is the answer?公仔箱論壇+ \8 f, I6 }6 l5 h  D! t

5 M' V1 s% w( A公仔箱論壇boss's loss:
* r! d0 P% a  o5 f* C100 return to neighbour5.39.217.76  v9 f* R( u! j$ k' z, ?
79 return to buyer
) D) {/ G5 e+ h' ^9 E- r( P, C3 p18 cost of product
+ j4 U+ {. e/ f; t" y) m5 Ctvb now,tvbnow,bttvb= 197
197
y 97 R??????
197
97...
97蚊
100+79+18
197????
100(cash)+18(cost)
100(cash)+97(change)+18(cost)+3(profit)
197 or 200
197-200
200-197
Thank you
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