【沾維拉】評論
6,000,000*30%=1,800,000成本*10%=1,800,000 = 成本=18,000,000單位成本=18,000,000/1,000=18,000
【manygolin】評論
利潤=6,000,000*30%=1,800,000假設每單位售價為X成本=X*1,000-1,800,000加成率=10%=利潤/成本 =1,8000,000/X*1,000-1,800,000解得X=19,800. 成本=19,800*1000-1,800,000=18,000,000則每單位成本=18,000,000/1,000=18,000