197 is the right answer.
4 {: k, Y* C/ c$ g# `
, T/ z6 z% Y: W9 d' h0 g4 o公仔箱論壇Reason, 8 L1 N/ H3 q% V; \% |; f
7 _0 G$ S2 C. @% p7 _公仔箱論壇1. $18 costs on Item = -$18
) @/ } h1 F$ Wtvb now,tvbnow,bttvb2. got $100 fake, (no income) , layout $79, = -$79
, x3 h* F+ ~( \/ l% {9 a, w) ~tvb now,tvbnow,bttvb3. pay back to $100 to that vendor whom exchange fake $100 here -$100
" r4 ]+ @: x4 U2 P3 n+ t
) r4 d f0 C/ O2 F3 z公仔箱論壇Therefore, totally, 18+79+100 = 197  |