 News from the Radio Oklahoma News Network. I'm Ken Johnson. Oklahoma City's Devon Energy is spending $5 billion in cash and stocks to buy a private equity company that owns the Grayson Mill Energy Firm. The deal involves oil, gas, and potash holdings in the Williston Basin, which covers portions of three states and a part of Canada. An idea that began more than a year ago is now about to move forward. More from Radio Oklahoma's Bob Zandt.