Gasoline barge prices in northwest Europe rose on Friday, boosted by brisk cargo exports as demand builds ahead of the peak summer driving season. "Things are perking up," said one trader. "Big slugs of reformate are heading to Asia again. There is good demand in the east still. West Africa blends are still taking place... Reuters shipping data showed a flurry of new vessels booked to carry gasoline or its components, which include reformates. Cargill booked a tanker to carry gasoline across the Atlantic and Valero booked another for the east coast of Canada, the data showed. BP fixed two vessels to carry gasoline to West Africa and PMI fixed three tankers to Mexico.