User manual - fx-CG20 (ソフトウェア)
7-8
5. 年賦償還
u
計算式
a
INT
b
PRN
c
BAL
d
Σ
PRN
e
Σ
INT
a
b
PMT
BAL
PV
INT
PRN
PMT
c
a
b
e
d
a : INT
PM1
= I BAL
PM1–1
× i I × (PMT sign)
b : PRN
PM1
= PMT + BAL
PM1–1
× i
c : BAL
PM2
= BAL
PM2–1
+ PRN
PM2
d :
Σ
PRN = PRN
PM1
+ PRN
PM1+1
+ … + PRN
PM2
e :
Σ
INT = INT
PM1
+ INT
PM1+1
+ … + INT
PM2
PM2
PM1
PM2
PM1