NEW DELHI: Oil marketing companies Sunday increased the price of commercial LPG by Rs 10 for a 19-kg cylinder and hiked aviation turbine fuel (ATF) rates by Rs 1.37 per litre, in line with elevated international benchmarks, reports Atul Mathur.A 19-kg commercial LPG cylinder used by hotels and restaurants will now cost Rs 2,820 in Delhi. ATF prices have risen to Rs 138.5 per litre. This is the third consecutive monthly increase in commercial LPG prices and the fourth straight monthly hike in ATF rates.The price of commercial LPG varies across states due to differences in tax structures. A 19-kg cylinder will now cost Rs 2,775 in Mumbai, Rs 2,971 in Kolkata and Rs 2,994.50 in Chennai.There has been no change in the price of the 14.2-kg domestic LPG cylinder, which continues to cost Rs 942 in Delhi. Petrol and diesel prices also remain unchanged.ATF and LPG prices are revised on the first day of every month based on international benchmark prices and the rupee-dollar exchange rate.International crude oil prices remained elevated through Oct, with Brent crude trading at $113.43 per barrel on Saturday. The Indian basket of crude oil averaged a record $119.96 per barrel in Oct.