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100块呀~~~
197... wat is the answer?8 r* w) a5 u) s& L7 P9 b# g. q

0 h1 V5 t% [  H) \7 f6 fboss's loss:
& P. o" {" }& s5.39.217.77100 return to neighbourtvb now,tvbnow,bttvb' q0 H* k7 m  g" u
79 return to buyer. Z* w' J6 o/ s
18 cost of product
' n# N4 L6 d0 B  l; D= 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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