|period ended 31/12/2013||period ended 31/12/2012|
|Revenues from product sales||2,122,758||2,113,878|
|Revenues from sales of goods and materials||589,649||460,959|
|Revenues from sales||2,728,681||2,596,293|
Group companies hedge a portion of revenues from sales related to the risk of changes in commodity prices and exchange rate changes. In 2013, in connection with the realisation of the hedged item, the Group companies recognised the effective portion of derivatives used as hedging of future cash flows in revenues from sales in the amount of PLN 2,886,000, and respectively PLN 7,129,000 in 2012.