HP 12C Platinum Owner's Handbook Manual page 54

56 Section 3: Basic Financial Functions
The number of payments keyed in just before f! is pressed is taken to be
the payments following any that have already been amortized. Thus, if you now
press 12f!, your HP 12C Platinum will calculate the amounts applied to
interest and to the principal from the second year's payments (that is, the second
12 months):
Keystrokes
12f!
~
dd
:$
:n
Pressing :$ or :n displays the number in the PV or n register. When
you did so after each of the last two calculations, you may have noticed that PV
and n had been changed from their original values. The calculator does this so
that you can easily check the remaining balance and the total number of
payments amortized. But because of this, if you want to generate a new
amortization schedule from the beginning, you must reset PV to its original value
and reset n to 0.
For example, suppose you now wanted to generate an amortization schedule for
each of the first two months:
Keystrokes
50000$
0n
1f!
~
1f!
~
:n
Display
–6,570.72 Portion of second year's payments
applied to interest.
Portion of second year's payments
–309.48
applied to principal.
Number of payments just
12.00
amortized.
49,419.21 Balance remaining after 2 years.
Total number of payments
24.00
amortized.
Display
50,000.00 Resets PV to original value.
Resets n to zero.
0.00
Portion of first payment applied to
–552.08
interest.
Portion of first payment applied to
–21.27
principal.
Portion of second payment applied
–551.85
to interest.
Portion of second payment applied
–21.50
to principal.
Total number of payments
2.00
amortized.