不得扣抵比例=(8,000,000-3,000,000)/(13,000,000-3,000,000)=50%銷項稅額=5,000,000*5%=250,000可扣抵進項稅額=(進項稅額-不可扣抵進項稅額)*(1-不得扣抵比例)=[(3,000,000*5%)-(10,000+40,000)]*(1-50%)=50,000應納稅額=250,000-50,000=200,000