Bally Entertainment Corp. said it sold its...

Bally Entertainment Corp. said it sold its 600,000 shares in Circus Circus Enterprises Inc. at a $4-million profit after Circus Circus rebuffed its unsolicited proposal to merge the two gaming companies. . . . Ford Motor Co. said its North American vehicle exports surged 75% in the first six months of the year, with shipments to Mexico, Europe and Japan leading the way. Ford said it exported 57,215 cars and trucks from North America in the first six months of 1994, compared to 32,569 vehicles a year ago. . . . General Nutrition Cos. said it agreed to buy Wilmington, Mass.-based Nature Food Centres Inc. for $62 million, cementing its position as the country’s largest specialty retailer of vitamins and nutritional supplements.