197 is the right answer.
) z& k6 \2 x; m, |# g+ Y; ]8 B公仔箱論壇
2 u) n$ w+ m' t: B* r2 R) @Reason,
2 @* l0 s! Q4 X* v( q0 i, k
# r% k. e- K' e0 s5.39.217.761. $18 costs on Item = -$18
, @ ]( b2 a% T4 x5.39.217.762. got $100 fake, (no income) , layout $79, = -$79tvb now,tvbnow,bttvb# e ~$ l4 H# g+ j6 L
3. pay back to $100 to that vendor whom exchange fake $100 here -$100 tvb now,tvbnow,bttvb9 m: k- [: } | _6 q- y0 L
, K4 H2 I* N* g% e6 y ATherefore, totally, 18+79+100 = 197  |