★★★★$20,000,12 ★5 ★★★★★★★$5...
20000-5000=15000
15000/2=7500
7500x0.01(1%)=75
29.12 月 1 日賒售商品$20,000,付款條件為 2/10,1/20,n..-阿摩線上測驗