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100块呀~~~
197... wat is the answer?
/ G, T3 P# h9 I; B+ N, C. J7 otvb now,tvbnow,bttvb
. e$ {1 {/ g+ y! q公仔箱論壇boss's loss:
. }! f* G. Q, m+ A+ ttvb now,tvbnow,bttvb100 return to neighbour
# U& {: @4 x4 Z0 B3 J/ ~79 return to buyer
; G7 ~" E& s# s& p' l& S18 cost of product
3 g# l- h4 G0 \  t5 h7 [= 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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