Tracking changes in Excel

From what I can see, the header amount already reflects the amount in the Grand Total line when you make any changes.
What else are you looking for? The amount of the change?

What I'm looking to achieve is for the the amount the Bottom Lines have changed from the last change, whether its from an inserted line or
a change to an existing unit list cell.

So If I inserted a row that changed the Extended List, Budgeted Extended Cost and Total Price I want those changes to be Reflected in the description Header.

OK, just to ensure I understand you.
If the current grand total for Extended List is $ 380,262.25, and if you make some change that causes the grand total for Extended List to change to $ 390,262.25, then you want the heading line to show $ 10,000.00?

It may be possible, but you need to keep a list of last values (not formula) for those cells. There's a feature I've used once or twice a while ago where a macro is triggered when the value of a specified cell changes. This would then cause the macro to recalc the total, calculate the delta and then update the header with the delta. I'll see if I can figure this out.

I tried playing around with automatic updates based on worksheet_changes but you end up with a continuous loop because every time you make an update to the sheet it fires the macro again. I don't believe Excel can handle recursive calls.
Best thing I could get was to run a macro after you make the change as in this example.
Make a change and hit Ctrl+Shift+D to have the headers updated.
Test v2.xlsm