197 is the right answer. 公仔箱論壇6 }: m& |+ P6 x9 P4 `" @
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Reason, www3.tvboxnow.com- ^4 q4 ~& O+ @4 s
) @: @% `; G" b7 L |1. $18 costs on Item = -$18( G- ?2 w0 N A1 P6 f
2. got $100 fake, (no income) , layout $79, = -$79www3.tvboxnow.com( G5 W' I* r4 c4 D" w* t! O5 r- R
3. pay back to $100 to that vendor whom exchange fake $100 here -$100 / ~% ~, h( } k- @; x; w
& L" O5 |( y/ _6 vTherefore, totally, 18+79+100 = 197  |