The barrel of Brent, a reference to Angolan exports, closed the week at 90.15 dollars, and given the favorable market conditions, it is expected that it will rise to higher levels throughout the sessions that resume today on the stock exchanges. Market details show that, over the last 52 weeks, the order price per barrel has varied between $71.28 and $97.69 for 1,000-barrel contracts. Deliveries for June, in turn, last Friday, were being carried out