21+50+15=86
% s$ z( w: U& Z5.39.217.76why 86...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。 V. [& {4 r& Q4 y9 |8 s5 ?6 `2 r
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21* A, h+ | Y+ V- O
then he giv bck his fren 50
% }% J% w8 e# x8 m+ Iand the shoes cost is 15
8 j/ l3 h7 x8 d& ] {; h9 Ptvb now,tvbnow,bttvb/ k1 r) h' Y+ _
so total he loss is 86...
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. ]' Y+ r8 L* v% c. W) B3 gtvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |