KUALA LUMPUR (AFX-ASIA) – Petronas Dagangan Bhd said its six months to September sales rose by 26.4% year-on-year to RM4.517 billion on the back of higher sales volume but its pretax profit fell 50.2% to RM158.1 million as a result of higher average cost of sales. (US$1=RM3.8). In the notes accompanying its results, Petronas Dagangan…