Kandalaksha Online reports, without indicating the source, that the average wage in Kandalaksha as of April 2019 is 28,600 roubles per month, or just under $500/month. The current exchange rate is in the area of 66 roubles for one dollar US.
The Murmansk Region average is 29,442 roubles per month.
According to the same report, new job openings in Kandalaksha offer 33,245 roubles per month while an average job seeker is looking for a 25,000 roubles per month wage. A reversal of what I would expect but..
Comments under the article accuse the figures of being inflated but judging from the fact that no one seems to be starving (yet), the number of new cars around, and small consumer-oriented business appearing to be surviving if not thriving, these seem like reasonable figures.