21+50+15=86tvb now,tvbnow,bttvb7 J0 V8 L6 {% c7 C+ b
why 86...5.39.217.77( L8 G) {% [; P* T/ L! i
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
6 E2 s3 k- j( P9 E6 k9 g' n; xthen he giv bck his fren 50公仔箱論壇( ~- T0 F& a3 \3 A' y
and the shoes cost is 15tvb now,tvbnow,bttvb$ X: @, o8 M( s' W* w. x
, t) d X6 I8 ^' U0 r0 rso total he loss is 86...
1 C4 O" J2 R+ z5.39.217.77tvb now,tvbnow,bttvb8 E3 P6 T4 F& Q! X9 D+ K
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |