How much are they paying for power?
Seriously though in Irkutsk electricity is about 0.017usd per kilowatt/hour
https://www.pge.com/tariffs/tm2/pdf/ELEC_SCHEDS_E-1.pdf
Even using a time-of-use plan like E6 (which they don't allow any more), off-peak is $0.16728/kWh in the summer, and peak summer is $0.35933/kWh. The ETOU-A and ETOU-B plans they're pushing people toward bottom out at $0.17279/kWh winter off-peak, up to $0.36335/kWh. Again, all baseline figures. Electric Vehicles and over-baseline (read: mining) will punish you to death.
https://www.pge.com/tariffs/tm2/pdf/ELEC_SCHEDS_E-TOU.pdf
In those rate plans, PG&E apparently spends more on transmission alone than Siberian customers entirely pay for service. Also, good luck explaining the plan structure to someone; it took me 20 minutes of edits just to put this comment together coherently.
Siberia has huge rivers which are very suitable for building hydroelectric because the accompanying flooding happens in mostly uninhabited areas and thus has relatively little costs.