CHENNAI: Ambuja Cements Limited saw its net sales rise by 11 per cent to Rs.1,464 crore for the quarter ended June 30, 2007 from Rs.1,314 crore in the year-ago period . This has been accompanied by a 17 per cent rise in operating profit to Rs. 594 crore from Rs. 509 crore. The profit after tax has risen by 23 per cent to Rs. 404 crore from Rs. 327 crore.