JATER

假設原本有$10, 用$8買雞, 剩$2/ u; p2 `0 z: a1 X! T
之後$9賣出, $2+$9 = $115.39.217.77:88981 p0 J' h6 ^/ ?+ {; H* M' [
再用$10買雞, $11-$10 = $1
$ @( x) O' d/ Q5.39.217.77:8898又再以$11賣出, $1+$11 = $12公仔箱論壇; L" D- Y2 `$ D9 [6 @6 F4 U
$12-$10 = 賺$2