At first they paid $30-tvb now,tvbnow,bttvb, ?# b* l7 Z# J+ c
and they get return $3-TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。$ `0 v- r$ e9 t' @" C) {& x: C0 Z
that mean they just paid $27-
: G5 E" H; J" |1 w8 Zthe owner take $25- and the servant take $2TVBNOW 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。' p3 P/ ` ]6 m! a* \
so the sum is totally equal |