Gujarat NRE Coke has announced its results for the quarter ended December 2010. It has reported profit after tax of Rs 20.5 crore, down 23% as compared to Rs 26.7 crore in same period the previous year. Sales went up by 40% at Rs 438.8 crore from Rs 312.5 crore. Operaing profit margin went down at 12% versus 22%.