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100块呀~~~
197... wat is the answer?
& }' F/ G" d7 v公仔箱論壇
0 [* t: z9 B' W2 t5.39.217.76boss's loss:
3 z( r  c1 f2 {# S8 _& ]$ o% P100 return to neighbour公仔箱論壇- F$ m( T7 l0 e4 B  j" K5 \
79 return to buyer
( S7 U- k) X2 i! c) x7 K18 cost of product5.39.217.764 N! g& f* T( j" {# i- l& H
= 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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