The Museum of HP Calculators

HP Forum Archive 13

 HP12C - Internal Rate of ReturnMessage #1 Posted by David L. Taylor on 8 Aug 2003, 11:16 a.m. I no longer have my owner's manual and now need to info on how to calculate IRR for irregular cash flows.

 Re: HP12C - Internal Rate of ReturnMessage #2 Posted by Gene on 8 Aug 2003, 12:05 p.m.,in response to message #1 by David L. Taylor Initial investment \$10000 Cash Flows: Year 1 \$5000 Year 2 \$4000 Year 3 \$3000 Clear the financial registers. 10000 CHS g CFo 5000 g CFj 4000 g CFj 3000 g CFj f IRR 10.65%

 Re: HP12C - Internal Rate of ReturnMessage #3 Posted by Patrick on 8 Aug 2003, 2:32 p.m.,in response to message #2 by Gene In addition to what Gene has said, if any consecutive set of cash flows are equal, you can use the Nj function to specify how many times the flow repeats. Extending on Gene's example, suppose that there were flows in years 4, 5, and 6 that were all equal to the \$3000 flow in year 3, then instead of keying these in individually, you can just type "4 g Nj" just before the "f IRR" keystrokes. The 4 signifies 4 payments of \$3000 corresponding to the four years (3, 4, 5, 6). Apart from saving some keystrokes, this method also saves on memory registers. Basically, you only use one memory slot for a repeated flow. Somehow, the HP engineers have stored the value of Nj (which can be as large as 99) in some spare bits inside the calculator, probably in the bits in the memory register which holds the payment itself.

 Re: HP12C - Internal Rate of ReturnMessage #4 Posted by Gene on 8 Aug 2003, 2:50 p.m.,in response to message #3 by Patrick Quite correct! One can also see an example from my business math textbook that uses the HP-12c... http://www.rskey.org/gene/hpgene/book.html

 Re: HP12C - Internal Rate of ReturnMessage #5 Posted by Luc (Vietnam) on 8 Aug 2003, 8:07 p.m.,in response to message #1 by David L. Taylor Hi, You can download and read the manual of HP 12C Platinum at: http://h20015.www2.hp.com/content/common/manuals/bpia5309/bpia5309.pdf The way to use of HP 12C is mostly similar with HP 12C Platinum (in PRN mode). Good luck!!! Luc - Vietnam

Go back to the main exhibit hall