They also want to peg the cost of services to the dollar in the longer term if the situation doesn't improve, sources at one brothel tell the local FlashNord news agency . Two hours with a prostitute in Murmansk cost 3,000-7,000 roubles ($57-132; £36-84) before the price rise, the agency says. The management of another brothel says it's "trying to keep prices down, but the cost of living is rising and the girls can't work at a loss". The rouble has lost more than 40% of its value against the dollar and 60% against the euro since the start of the year, as a result of Western sanctions over Russia's involvement in the eastern Ukraine insurgency and a fall in oil prices.