[img]http://d.yimg.com/a/p/ap/20100704/capt.3ad68d466d6d47a9a6eb49ed0daccb79-3ad68d466d6d47a9a6eb49ed0daccb79-0.jpg?x=95&y=130&q=85&sig=U_OlCiqVTgggL9DZqCN7BA--[/img]AP - BP's costs for the disastrous Gulf of Mexico oil spill climbed nearly half a billion dollars in the past week, raising the oil giant's tab to just over $3 billion for work on cleaning and capping the gusher and payouts to individuals, businesses and governments.