 It's market information on the Lone Star Farm and Ranch Report. At this stage in the game, feedlots possess the market's leverage, and the only card in which packers can really play is to cut processing speeds. But with beef prices as high as they are, and given that processing speeds have already been reduced, packers don't have much say. Boxed beef prices closed mixed yesterday. Choice was up 48 cents to $3.2333.