銷貨毛利率=銷貨毛利/銷貨淨額
270,000-20,000=250,000
(250,000-100,000)/250,000=0.6
13 請就下列數據計算銷貨毛利率:銷貨收入$270,000,銷貨退回$20,00..-阿摩線上測驗