課稅所得:628,000-48,000+20,000-200,000-100,000+200,000=500,000
當期所得稅費用:(400,000-200,000)+(300,000-200,000)-(300,000-100,000)*20%=100,000*20%=20,000
遞延所得稅費用:500,000*20%=100,000