I asked three different CFOs from three mining companies regarding PRB,s royalty payout from AEM and none of them can give me a definitive answer about how much that they can receive yearly even though I gave them all the known details regarding the mine.They said that there,s usually some hidden clause or agreement in the contract which does not need to be disclosed on Sedar.These are the people I know who had made all kinds of agreements and contracts with major mining companies over the years.