First, Do you know how many acres of mineral you own? If not, go to the co. clerk office and check it out or hire someone who can do it for you. Lots of people out of work, so it's easy to find someone to do the checking.
#2 How big is the pooled acres, most are 640 in OK. You can call OCC and ask, know your legal, name of well ( on the DO), etc.
Once you figure that part out then you can make sure you have the right decimal point
You take what % your lease says you get, like 1/8, 3/16, 1/4, etc. This is also filed at the Co clerk office in case you don't have a copy of the lease.
Now take the total BB times the % you get, divide by 640 if that is the pooled Acres then times the acres you own. That will give you the amount you are to get paid on. This is the long way of doing it, but you can't miss with this method. Then take the # times the price of gas or oil.
Example: Total BB 1,000, times you % (3/16) = 3000 divided by 16= 187.5 b.
187.5 divide by 640 (pooled a)= .293 per A
160 A (A you own) times .293 = 46.87 total bb per statement or month.
46.87 BB x price $50 = $2343.50 less deduction.
Always check the decimal point on all leases. Oil companies love people who think the oil company are a great guy, but they do make mistakes. And some oil companies makes mistakes to their advantage.
Also, if you have a no deduction lease, make sure you don't getting charged for things you shouldn't pay for. Everyone has to pay production tax, OKLA tax, and a few government charges.