197... wat is the answer?
' C9 M4 s h) D8 m `* q+ u! ~2 J% k* |2 ~% {/ n) h
boss's loss:公仔箱論壇& z: j$ K s2 e9 ]1 A8 d
100 return to neighbour
* V( |5 B8 x# c! g, Wtvb now,tvbnow,bttvb79 return to buyer0 E! X' M/ A) Q# i1 b, L* h% c7 B" |# `
18 cost of product1 o, [0 m6 v; h( |1 N X1 V
= 197 |