The result is a new cost equation that is returning some manufacturing to the U.S. This year Jarden will insource $100 million worth of goods (in wholesale value)--about 4 million items--to the Americas, mostly from Asia, half of that to the U.S. That includesWorth carbon-fiber softball bats, now in full-swing production in Caledonia, Minn.; marine-antenna castings in Greenville, S.C.; Quickie m