French train giant Alstom said Monday it had signed a memorandum of understanding to buy Canadian company Bombardier's rail division. The total price for all of Bombardier Transportation's shares, to be paid as a mix of cash and shares, is expected to come to between 5.8 billion ($6.3 billion) and 6.2 billion euros ($6.7 billion), Alstom said. liu/jh/pma