假設原本有$10, 用$8買雞, 剩$2公仔箱論壇# w3 Y' X# X9 k( ~/ f
之後$9賣出, $2+$9 = $11
4 N+ m1 r' v* P4 [# Q公仔箱論壇再用$10買雞, $11-$10 = $1
) p n* p# a5 W$ |% w5.39.217.77:8898又再以$11賣出, $1+$11 = $12TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。! L, `+ ], N2 F, L
$12-$10 = 賺$2 |