JATER

假設原本有$10, 用$8買雞, 剩$2
! K5 O3 @! \$ r% @+ c5 y7 Qtvb now,tvbnow,bttvb之後$9賣出, $2+$9 = $115.39.217.77:88980 N; `7 v7 k$ }  `  b' b2 j: j
再用$10買雞, $11-$10 = $1tvb now,tvbnow,bttvb- K# y! q. C9 P
又再以$11賣出, $1+$11 = $123 K0 c" U! f, i
$12-$10 = 賺$2