It's now 13 months since chocolate-maker Hershey Co. tried to break up Kraft Foods Inc.'s, $19.5 billion takeover of British icon Cadbury PLC.  A funny thing happened on the road to also-ran. Free from distraction, Hershey got back to the tired, old business of running a business.  Hershey sales are up 10% since 2008. Its gross margins improved by seven percentage points.
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