Sugar prices remained unchanged on Friday. On Thursday, 12-14 mills sold 18,000-20,000 bags at ₹3,100-3,140 a quintal of S-grade and ₹3,120-3,150 of M-grade. Bombay Sugar Merchants Association spot rates: S-grade ₹3,222-3,262 and M-grade ₹3,242-3,366. Naka delivery rates: S-grade ₹3,185-3,195 and M-grade ₹3,225-3,250.