algebraic formula to calculate "net uniform series" (NUS)

I am looking for this formula, which I can't find on the web. My HP-19BII
calulates it, but I want to use it in Excel, and need to be able to vary
inputs and get instant NUSs. Thanks!

http://www.google.com/search?hl=en&q...=Google+Search

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Regards,
Tom Ogilvy

"Johnny Logan" <Johnny [email protected]> wrote in message
news:[email protected]...
> I am looking for this formula, which I can't find on the web. My HP-19BII
> calulates it, but I want to use it in Excel, and need to be able to vary
> inputs and get instant NUSs. Thanks!