10. Cost of sales

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  2012
RUB Million
2011
RUB Million
Materials and services (21,792) (21,792)
Salaries and social contributions (11,963) (11,078)
Potash (4,598) (3,026)
Natural gas (5,733) (4,951)
Depreciation (5,936) (5,486)
Fuel (4,579) (4,207)
Sulphur and sulphuric acid (3,597) (4,838)
Electricity (3,255) (3,290)
Other items (88) (51)
Change in stock of WIP and finished goods 1,405 737
  (60,136) (56,196)
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