Key TakeawaysTyson Foods posted better-than-expected results for the fourth quarter as higher beef and chicken prices lifted sales.Beef sales gained 4.6% from a year ago, while chicken sales increased 2.3%.Shares of Tyson surged Tuesday following the news. Tyson Foods (TSN) shares took off Tuesday after the meat processor beat profit and sales estimates as higher prices helped boost beef and chicken sales. The company posted fourth-quarter adjusted earnings per share (EPS) of 92 cents, above the analysts' e ...