1.X5折舊費用=(108,000-3,000)*(5/(1+2+3+4+5))*(1/2)=17,500
2.X6折舊費用=(108,000-3,000)*((5/(1+2+3+4+5))*(1/2)+(4/15)*1/2)=31,500
X6/12/31設備BV=108,000-17,500-31,500=59,000
3.X7折舊費用=(59,000+19,000)*(5/(1+2+3+4+5))=26,000
4.X8折舊費用=(59,000+19,000)*(4/(1+2+3+4+5))=20,800
5.X9年1到4月折舊費用=(59,000+19,000)*(3/(1+2+3+4+5))*(4/12)=5,200
X9年5/1設備BV=108,000-(17,500+31,500-19,000+26,000+20,800+5,200)=26,000
X9年5/1出售設備利益=30,000-26,000=4,000
4000