# HP 12C Platinum User Manual Page 81

Financial calculator.

Note:
If you change the number in the n register in order to change an N
be sure to reset the number in the n register to the total number of cash flow
amounts originally entered (not including the amount of the initial investment
CF
). If this is not done, NPV and IRR calculations will give incorrect results.
0
Example 1: With the cash flows now stored in the calculator, change CF
\$11,000 to \$9,000, then calculate the new NPV for a 13.5% return.
Keystrokes
9000?2
13.5¼
fl
Since this NPV is negative, the investment would decrease the financial value of
the investor's assets.
Example 2: Change N
Keystrokes
5n
4ga
7n
fl
*
This step is necessary in this example because we have calculated IRR since the first time we
calculated NPV. The IRR calculation replaced the 13.5 we keyed into i before calculating
NPV with the result for IRR – 13.72.
Display
Stores the new CF
9,000.00
Stores i.
13.50
The new NPV.
–644.75
from 2 to 4, then calculate the new NPV.
5
Display
Stores j in the n register.
5.00
Stores the new N
4.00
Resets the number in the n register
7.00
to its original value.
The new NPV.
–1,857.21
2
in R
.
2
2
*
.
5
81
,
j
from  