NPV calculations - Excel sheet?

[TUS 373]

Wondering if anyone out there can prevent me from having to reinvent the wheel? I am looking at doing some NPV analysis on long term projects (to 10 years) and thought it would be useful to put something together in an Excel spreadsheet. No doubt, others have gone before me on this, so before I embark, I would just like to ask if anyone out in PH land has already put together a simple Excel template for doing these with? If so please could I have a look?

With thanks

TUS