The price for crude oil produced by the Organization of the Petroleum Exporting Countries (OPEC) fell by almost a dollar on Wednesday but stayed above 120 dollars a barrel, OPEC said on Thursday according to DPA which carried the news today. One barrel (159 litres) of OPEC-produced crude stood at 120.88 dollars Wednesday, 0.85 dollars less than 121.73 dollars on the previous day. OPEC calculates an average basket price based on 13 important brands produced by cartel members.