Kolkata-based Hindusthan National Glass & Industries Ltd (HNG) reported a 19 per cent dip in net profit to Rs 26 crore for the April-June quarter on account of higher interest payouts and rising input costs. According to a company release, power and fuel costs went up by 35 per cent over the corresponding quarter. Interest payments rose over 62 per cent to Rs 20 crore. HNG, however, posted an 18 per cent increase in net sales to Rs 431 crore.