題目誤導人~
& d, H6 h( M. |- g公仔箱論壇owner 100tvb now,tvbnow,bttvb: F' M/ P" ?8 S
owner's son 20
. l3 Y9 W( a9 atvb now,tvbnow,bttvbeach pay 40
/ y9 `6 p; F, H# q- o公仔箱論壇40*3 = 120tvb now,tvbnow,bttvb" U9 {+ i& _0 d
120(3 guys) - 20(owner's son) = 100 (owner) |