Texas Instruments -84 Plus, Manual Book

Page: 641 / 696

Appendix B: Reference Information 638
Amortization Amortization Amortization Amortization
If computing
bal
(),
pmt2
=
npmt
Let
bal
( 0 ) =
RND
(
PV
)
Iterate from
m
= 1 to
pmt2
then:
Balance, principal, and interest are dependent on the values of
PMT
,
PV
,
æ
, and
pmt
1 and
pmt
2 .
where: RND = round the display to the number of decimal
places selected
RND12 = round to 12 decimal places
I
m
RND RND 12 – i bal m 1 –
( ) × ( ) [ ]
=
bal m
( )
bal m 1 –
( )
I
m
– RND PMT
( )
+ =
⎩
⎨
⎧
bal ( ) bal pmt 2
( )
=
Σ
Pr n ( ) bal pmt 2
( )
bal pmt 1
( )
– =
Σ
Int ( ) pmt 2 pmt 1 – 1 +
( )
RND PMT
( ) × Σ
Pr n ( ) – =