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100块呀~~~
197... wat is the answer?tvb now,tvbnow,bttvb; l2 A! n  X: U' g  X
www1.tvboxnow.com) o7 Y. p' T( a, D$ ^. {6 V7 V
boss's loss:
3 V' s) t1 ?# kwww1.tvboxnow.com100 return to neighbour
* t, y6 M8 c- M% O4 b9 |7 Z5 ]# l( Y公仔箱論壇79 return to buyer公仔箱論壇4 Y; l% ?% ?) Q; W- I$ V! S- L
18 cost of product' ?, j, W( ^* y
= 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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