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100块呀~~~
197... wat is the answer?5 W- i" o7 B# s8 H; G8 v

9 I7 b5 n& Z/ l3 b3 V( l% w  h8 Atvb now,tvbnow,bttvbboss's loss:tvb now,tvbnow,bttvb; ~+ V6 F- R% e4 P" w# x6 {0 }2 S% ?6 P
100 return to neighbour
% x! Z* k7 H! r* H+ j+ [' Ltvb now,tvbnow,bttvb79 return to buyer
4 F( G9 f; X4 \! Q5 H18 cost of product
7 v2 ~5 i5 s# s  I2 i= 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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