74  Section 4: Additional Financial Functions 
 
File name: HP 12c Pt Converted_user's guide_English_HDP0F123E02_080207  Page: 11 of 281   
Printed Date:  {  2007/8/2Dimension: 14.8 cm x 21 cm 
 
In summary, to enter the cash flow amounts: 
1. Press fCLEARH to clear the financial and storage registers. 
2.  Key in the amount of the initial investment, press Þ if that cash flow is 
negative, then press gJ. 
3.  Key in the amount of the next cash flow, press Þ if the cash flow is 
negative, then press gK. If the cash flow amount is zero in the next 
period, press 0 gK. 
4.  Repeat step 3 for each cash flow until all have been entered. 
With the amounts of the cash flows stored in the calculator’s registers, you can 
calculate NPV as follows: 
1.  Enter the interest rate, using ¼ or gC. 
2. Press fl. 
The calculated value of NPV appears in the display and also is automatically 
stored in the PV register. 
Example:
 An investor has an opportunity to buy a duplex for $80,000 and 
would like a return of at least 13%. He expects to keep the duplex 5 years and 
then sell it for $130,000; and he anticipates the cash flows shown in the diagram 
below. Calculate NPV to determine whether the investment would result in a return 
or a loss. 
 
Note that although a cash flow amount ($4,500) occurs twice, these cash flows 
are not consecutive. Therefore, these cash flows must be entered using the method 
described above. 
Keystrokes Display  
f
CLEAR
H
 
0.00 
Clears financial and storage 
registers. 
80000
ÞgJ
 
–80,000.00
Stores CF
0
 (with minus sign for a 
negative cash flow).