8,000,000+12,000,000. = 500
40,000
500*20,000=1,000,000
10,000,000 (20x7年帳面價值)-1,000,000. = 300
50,000-20,000
300*10,000=3,000,000
20X7年初帳面金額=($8,000,000+$12,000,000)×(40,000-20,000)/40,000=$10,000,000
折耗=[($10,000,000-$1,000,000)÷(50,000-20,000)]×10,000=$3,000,000
11.民安公司於 20X4 年初以$8,000,000 取得一座蛇紋石(Serp..-阿摩線上測驗