(12C) Payback Period in Cash Flows

[rprosperi]

(03-25-2018 09:23 PM)Carsen Wrote:  Well that's embarrassing ;-). Let me rephrase that.

"It would also be radical if somebody could post how long the program takes to get the answer on a classic HP-12C made in the 1980's."

Okay. Here's how the cash flow (CF) problem would be entered into the 12C....

That helps a lot, thanks for clarifying the data entry steps.

On the '88 12C (same underlying h/w as when introduced), it takes about 8 seconds to produce the proper answer. I ran it 3 times to verify. Unfortunately, there is no TEVAL on a 12C, so it has to be measured by eye with a watch next to the machine.

Was this better or worse than you expected?

Suggestion: Update the PDF with these operating steps, as most folks will just grab the PDF and try it later, and no doubt some will be confused like I was... you know, us non-finance guys.