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100块呀~~~
197... wat is the answer?
3 I) V9 f+ z* V0 k' ?tvb now,tvbnow,bttvb
1 u  ^: F& K7 \- J3 U公仔箱論壇boss's loss:
( I: A8 `; r# H5 }5 o7 q100 return to neighbour6 F3 R" K* Z; G4 x
79 return to buyer
2 U$ c) N4 H+ J# M$ E18 cost of product公仔箱論壇$ D2 X0 W3 W+ {0 ^  V6 d* T
= 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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