# HP 12C Platinum User Manual Page 51

Financial calculator.

Keystrokes
(RPN mode)
n
12z
In ALG mode, perform the RPN steps but replace the last step with the step below.
Keystrokes
(ALG mode)
z12}
Because the calculator rounds the calculated value of n up to the next higher
integer, in the preceding example it is likely that — while 328 payments will be
required to pay off the loan — only 327 full payments of \$325 will be required,
the next and final payment being less than \$325. You can calculate the final,
fractional, 328th payment as follows:
Keystrokes
(RPN mode)
328n
M
:P
+
Keystrokes
(ALG mode)
328n
M
*
You could skip this step, since 328 is already stored in the n register. If you do so, however,
you will need to press M twice in the next step (for the reason discussed in the first footnote
on page 41; you would not have to press M twice if you had not pressed 12z in RPN
mode or z12} in ALG mode after w in the example above.) We choose to show this
and the following example in a parallel format so that the procedure is easy to remember: the
number you key is the number of the final payment — either the fractional payment or the
balloon payment — whose amount is to be calculated.
Section 3: Basic Financial Functions
Display
Number of payments required.
328.00
Twenty-seven years and four months.
27.33
Display
Twenty-seven years and four months.
27.33
Display
Stores total number of payments.
328.00
Calculates FV — which equals the
181.89
overpayment if 328 full payments
Recalls payment amount.
–325.00
Final, fractional payment.
–143.11
Display
Stores total number of payments.*
328.00
Calculates FV — which equals the
181.89
overpayment if 328 full payments
51
*