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HP HP-12c Manual

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Section 3
Basic Financial Functions
The Financial Registers
In addition to the data storage registers discussed on page 23, the HP 12C
Platinum has five special registers in which numbers are stored for financial
calculations. These registers are designated n, i, PV, PMT, and FV. The first five
keys on the top row of the calculator are used to store a number from the display
into the corresponding register, to calculate the corresponding financial value
and store the result into the corresponding register, or to display the number
stored in the corresponding register.
5
Storing Numbers Into the Financial Registers
To store a number into a financial register, key the number into the display, then
press the corresponding key (n, ¼, $, P, or M).
Displaying Numbers in the Financial Registers
To display a number stored in a financial register, press : followed by the
corresponding key.
6
Clearing the Financial Registers
Every financial function uses numbers stored in several of the financial registers.
Before beginning a new financial calculation, it is good practice to clear all of
the financial registers by pressing fCLEARG. Frequently, however, you
may want to repeat a calculation after changing a number in only one of the
financial registers. To do so, do not press fCLEARG; instead, simply store
the new number in the register. The numbers in the other financial registers
remain unchanged.
5.
Which operation is performed when one of these keys is pressed depends upon the last
preceding operation performed: If a number was just stored into a financial register (using
n, ¼, $, P, M, A, or C), pressing one of these five keys calculates the
corresponding value and stores it into the corresponding register; otherwise pressing one of
these five keys merely stores the number from the display into the corresponding register.
6.
It’s good practice to press the corresponding key twice after :, since often you may want
to calculate a financial value right after displaying another financial value. As indicated in the
preceding footnote, if you wanted to display FV and then calculate PV, for example, you
should press :MM$. If you didn’t press M the second time, pressing
$ would
store FV in the PV register rather than calculating PV, and to calculate PV you would have to
press $ again.
… 34 …


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