假設原本有$10, 用$8買雞, 剩$2% x, T& V) {/ l# b4 \- P) S
之後$9賣出, $2+$9 = $11
! D, B4 t4 S1 [; a/ I3 p+ w再用$10買雞, $11-$10 = $1TVBNOW 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。% T, s; K& x+ U. ?6 H
又再以$11賣出, $1+$11 = $12
2 \+ e+ H" R; B/ M+ c8 F; I, w; L$12-$10 = 賺$2 |