Posted by bruce-AR on March 23, 1999 at 08:45:16:

Hi Ed:

The HP12C is really easy to use for quick “note” calculations.

Start by using the yellow “f” key and “xy” key to clear the financial registers. Then key in the values you have (remembering that payments always go in as negative numbers - use the “CHS” key).

Typically you have 3 of the 4 numbers for the calculation and look for the 4th. for example to find the payments on a 10K note for 20 years at 10%:

key in 10000 and PV

key in 10 (not .10) and use the blue “g” key to convert the interest to monthly then hit the “i” key

key in 20 and again use the blue “g” key to convert to months and press the “n” key.

Now you simply hit the “PMT” key to calculate the payments. (it comes up -96.50 - remember payments are always negative)

I assume by “Y” you mean yield. “generally” speaking, your yield is the rate of return (ie “i”) you would calculate if you entered the PV, PMT and n, and then hit the “i” key to calculate the interest rate. For “irregular” cash flows you’d have to use the IRR function which is a bit more complex. Email me at bruce@seark.net with a fax number, and i’ll fax you the pages from the manual. If you have the manual read and work through the examples in section 4.

need any more help feel free to email…

bruce-AR