Are you going to tell us where you got your example from?
The example is certainly simple enough and clearly indicates cascading of income tax. Wish I'd have done it myself (sorry, but no I didn't). Since you can't seem to find things like that (that don't fit the SQL Playbook) I see no reason to help you out since you'll merely deny it or attempt to belittle ANY source.
You apparently felt it was straightforward enough that you attempted a cardiac bypass with your spreadsheet - but failed. Perhaps if you made a real attempt to show the effect of cascading taxes (instead of trying to proove it doesn't exist) the muse would strike you.