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100块呀~~~
197... wat is the answer?
, \" `6 n5 ^" N, x公仔箱論壇  u# x2 R/ q# f  R5 \8 K
boss's loss:
0 }! Y& T7 ]2 g6 O100 return to neighbourtvb now,tvbnow,bttvb" X5 t% V7 G9 t6 W2 g- O( z
79 return to buyertvb now,tvbnow,bttvb' Q5 J, N+ A- x# T6 x9 C
18 cost of product公仔箱論壇$ E- Q$ T) m& J! h# S
= 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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