Finance for Non-Finance Professionals

Some very good and valid points.

Here are some University level courses about finance.

So much can now be learned online.

Also this course: Finance for Non-Finance Professionals

In my experience, youtube videos are much better than text for understanding key concepts and terms like that. Depends on your learning style, obviously, but I'd give it a try if I was you.

As for courses, maybe check out Coursera? If you don't need the certificate, it's free as far as I know.

https://www.coursera.org/learn/finance-for-non-finance#

Your examples don't sound directly Finance-specific, so maybe look at something like business essentials, marketing or (management) accounting. If you have a few specific questions, there is a weekly questions thread every monday in this subreddit, questions there generally get answered.

OK so I don't remember the exact formulas/methods but what your doing is called "Discounting". Your math and logic looks right to me, inflation eventually is just negative interest.

There's this really great coursea course called Finance for nonfinance professionals and the first unit is all about the time value of money and how to properly discount returns on investments and such. Highly recommend even if you only do the first unit https://www.coursera.org/learn/finance-for-non-finance

One of the sites that has MOOCs is coursera.org. Coursera has a bunch of free college courses on finance from various colleges. https://www.coursera.org/learn/finance-for-non-finance

https://www.coursera.org/learn/family-planning