Prices of sugar inched up in the key wholesale markets of Maharashtra as millers quoted higher prices. Despite poor demand, mills are raising prices as there is no pressure on them to sell stocks. Millers will receive the new supply of sugar by mid-September and will have to manage with the current stocks till then. In North India, prices of sugar remained unchanged. Sugar futures on NCDEX it the 3% upper limit, taking cues from the strength in spot prices.