首月還款:160000/168+160000*6.55%/12=1825.71
第二月還款:160000/168+(160000-160000/168)*6.55%/12=1820.52
三月:160000/168+(160000-160000*2/168)*6.55%/12=1815.32
以此類推,每月遞減160000/168*6.55%/12=5.1984
最後壹月還款:160000/168+(160000-160000*167/168)*6.55%/12=957.58
利息總額:(1825.71+957.58)*84-160000=73796.4