It doesn't have to be financial. It's anything that can be quantified.

Some random sheets I've used, neither made by me nor about business:

https://docs.google.com/spreadsheets/d/1m08haqvTiXKIh4c7y4uM...

https://docs.google.com/spreadsheets/d/1Fo_-HebVr_9PruE94LgT...

I don't know how true it is today, but many a rollercoaster has been designed/planned in a spreadsheet. g-force and speed analysis, making sure there aren't any "blackout" points, etc. It allows you to iterate quickly and automatically appreciate the ramification of design decisions.