Newton, Iowa-based Maytag Corp. said it has begun a tender offer in its previously announced $960-million cash and stock bid for Chicago Pacific Corp. . . . The American Stock Exchange said it sold a seat on the exchange for $207,500, down $7,500 from the previous seat sale on Sept. 23 . . . Greek airline Olympic Airways will buy three Boeing 767-200s jetliners for a total of $180 million.