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100块呀~~~
197... wat is the answer?
( [9 f# z( H; [4 I( E& E, gwww3.tvboxnow.com
% V3 g; e9 n; f+ z) v8 \8 V  K, oboss's loss:
) O" y8 J- B' \100 return to neighbour
. `/ `/ Q2 I6 u: j+ k6 u0 J: t) W公仔箱論壇79 return to buyer公仔箱論壇/ j& ]' Y$ c/ j" `3 m
18 cost of product
! J3 w  K( ]4 Q4 k% O+ S1 ^= 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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