Hi Sportznut.
I really didn't get into the nitty gritty fine detail of your chart.
But if you used the appropriate formula then it should be fine.
But I do find a spreadsheet program to be much more useful.
I have all those margins in my spreadsheet and I then look up the bookies prices available and input them on my spreadsheet.
Then I have another formula which compares my price to that available and computes the overlay.
And also the overlay available for any combination of games for my multi-bets.