The oil price of the Organization of the Petroleum Exporting Countries (OPEC) eased to $76.80 at the end of last week, the Group said Monday. Continuing its zigzag course over the past five trading days, OPEC's basket price shed 0.23 dollars per barrel (159 liters), according to a report of the German Press Agency "DPA". The Group's 12 members pump over a third of the world's crude oil.