Oklahoma Percentage Depletion confusing

The reason I say 7% for the Federal is that Sch 511NR-1 Line 11 on my return has a number that is already reduced by 15%. So, I am thinking they want you to reduce it 7% more for Fed ( which they say is allowable ( this is where it gets confusing )). So, the " additional amounts" Fed and OK would be the same ????

I have a call into OTC -- more in a bit ( maybe )