[Nissan Motor fourth quarter net sales 3.1 trillion yen up 36% year on year] Nissan Motor fourth quarter operating profit of 87.41 billion yen, an increase of 56% year on year, estimated at 83.86 billion yen; net profit 106.86 billion yen, 14.2 billion yen in the same period last year, estimated at 49.99 billion yen Net sales are 3.1 trillion yen, an increase of 36% over the same period last year, and an estimated 2.85 trillion yen.