(一)進貨淨額=760,000-200,000+280,000=840,000
(二)成本毛利率=成本加價率=銷貨毛利/COGS=25% → 毛利率=25%/(1+25%)
期末應有存貨為X,
COGS=(1,500,000-20,000)*0.75=550,000+840,000-X
X=206,000
火災損失=206,000-6,000-8,000=192,000