Casio ALGEBRA FX 2.0 PLUS User Manual page 13

2-5 Amortization
This calculator can be used to calculate the principal and interest portion of a monthly
installment, the remaining principal, and amount of principal and interest repaid up to any
point.
u u u u u Formula
Amount of single payment
a
: interest portion of installment PM1 (
b
: principal portion of installment PM1 (
c
: balance of principal after installment PM2 (
d
: total principal from installment PM1 to payment of installment PM2 (
e
: total interest from installment PM1 to payment of installment PM2 (
a b
* + = one repayment (
a : INT
b : PRN
c : BAL
d :
e :
BAL PV INT
= (
0 1
Amortization
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;;;;;
e
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;;;;;
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d
1 2 m
INT
PRN
PMT
)
= I BAL
PM1 PM1–1
= PMT + BAL
PM1
= BAL + PRN
PM2 PM2–1
PM2
PRN = PRN + PRN
PM1
PM1
PM2
INT = INT + INT
PM1
PM1
PRN PMT
= 0 and = at beginning of installment term)
1
2-5-1
a
b
n
(Number of payments)
)
)
BAL
)
i I (PMT sign)
i
PM1–1
PM2
+ ... + PRN
PM1+1 PM2
+ ... + INT
PM1+1 PM2
20010101
c
PRN
)
INT
)