The cost of Russian gas for Ukraine in the second quarter of 2015 will be lower than first quarter 50-80 dollars per thousand cubic meters, said the Minister of energy Alexander Novak. He said that the prices for the production and delivery of gas is tied to the price of oil and oil products. "When cost is calculated according to the formula of the contract for the first quarter or II, are accounted for 9 of the previous months, there is a lag. During this period, oil prices declined and the prices under the contract (for gas - ed.) is also reduced