Out of all of the formulas I've tried, I believe this formula to be a more elegant alternative to Mitchell's formula.
However, like Mitchell's original formula, it still provides weird answers in some cases, but I believe these to source from elsewhere,
not from the adjustment formula.
For more information, please see:
https://docs.google.com/spreadsheets/d/1JT2yCBUAsFzMcbKsQUcH1DhcBbuWDKTgPvUwD9EqyTY/edit?usp=sharing
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