Dealing with Measure Totals

Hi Greg,
I realise this is an old post but it seems to still be, very much, relevent as I know loads of people who struggle with this concept.

I've tried to replicate the method you use for my own problem and kind of get half way but then hit the gravel.
Is there any chance you could apply your process to the issue I posted?
https://community.powerbi.com/t5/Desktop/Totals-Calculations-using-a-a-real-problem/m-p/2250407

Thanks

Paul