Warsaw. (Interfax-Europe) - Top Polish fuel firm PKN Orlen signed a contract with the Czech National Property Fund (FNM) to buy a 63% stake in Unipetrol, the biggest Czech downstream oil firm, for EUR 417 mln, Orlen said in a market statement on Friday. The Polish fuel firm promised to pay CZK 13.05 bln (EUR 417 mln) for Unipetrol, 9.76% of its subsidiary Spolana and receivables owed to some of the companies in the Unipetrol group. However, the agreement allows the buyer to adjust the price after an audit, down by as much as 25% and up by as much...