Video: Supply and demand of Prime beefApril 25, 2017 Share Tweet Comments (0) April 25, 2017Screen Shot 2017-04-25 at 10.16.10 AMMark McCully, vice president of production for Certified Angus Beef LLC talks about supply and demand of Prime beef, and what it means to those who produce it. Trending In: NewsSuspected cattle thief arrested after TSCRA special ranger investigationSepticemia can kill calves quicklyStabenow releases Forest Service sexual misconduct reportApocolyptic: The Northern Queensland Flood of 2019