Smartzboy

73$ bcus shoe = 15$: [! A: F( ~! i' G9 a/ i
             the boss paid to customer change = 29$: a6 s# f/ l, y* y1 v
            the boss paid back to other ppl = 29$公仔箱論壇% \7 w$ L9 L: g% O0 }& c+ x9 B

9 P6 }9 B: a" T6 h+ Atvb now,tvbnow,bttvbso, 15$ + 29$ + 29$ = 73$