Tyson Foods Inc TSN.N fell 8.4% after missing quarterly profit expectations. By Herbert Lash and Bansari Mayur Kamdar Aug 8 (Reuters) - Wall Street closed mostly flat on Monday after blockbuster jobs data last week reinforced expectations the Federal Reserve will crack down on inflation, while a revenue warning from chipmaker Nvidia reminded investors of a slowing U.S. economy. "Maybe we can get a little bit higher by year end, but that's if everything lines up perfectly," he said, adding that the University of Michigan's preliminary consumer sentiment survey for August on Friday also will be closely watched.