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The European Commission is expected to formally approve today the merger of Boeing Co. and McDonnell Douglas Corp. . . . Fort Lauderdale, Fla.-based Republic Industries Inc. said second-quarter earnings more than doubled to $69.5 million, or 17 cents a share, from $30 million, or 9 cents, a year earlier. . . . Pharmacia & Upjohn Inc. said second-quarter profit before one-time items dropped to $178 million, or 34 cents a share, from $269 million, or 51 cents, a year earlier. . . . PepsiCo Inc. said it received about $830 million from the sale of its PepsiCo Food Systems restaurant-supply unit to AmeriServe Food Distribution Inc., a unit of Greenwich, Conn.-based Holberg Industries. The purchase price was previously undisclosed. . . . U.S. Sugar Corp. and United Sugars Corp. will combine marketing operations, creating one of the nation’s biggest marketers of refined sugar.