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Amortization – Casio FX-CG10 User Manual

Page 273

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7-9

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 Formula

a

: interest portion of installment PM1 (

INT

)

b

: principal portion of installment PM1 (

PRN

)

c

: balance of principal after installment PM2 (

BAL

)


d

: total principal from installment PM1 to payment of installment PM2 (

Σ

PRN

)

e

: total interest from installment PM1 to payment of installment PM2 (

Σ

INT

)

*

a

+

b

= one repayment (

PMT

)


c

a

1 payment

Number of Payments

1

PM1

PM2

Last

............

...................

..........

b

c

a

1 payment

Number of Payments

1

PM1

PM2

Last

............

...................

..........

b

1 payment

Number of Payments

1

PM1

PM2

Last

.............

................

.............

e

d

1 payment

Number of Payments

1

PM1

PM2

Last

.............

................

.............

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

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

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