A trip to the grocery store is going to cost more next year, according to a new report by the U.S. Department of Agriculture.  Federal officials expect grocery prices to rise 3 to 4 percent overall in 2012. That change represents a slight tapering off from the 5 percent jump seen this year. But it's still dramatically higher than 2009 and 2010, when food-price inflation was the lowest since the 1960s...