Crude oil prices were up on Monday as the Organization of Petroleum Exporting Countries (OPEC) and its allies agreed on Saturday to extend their current crude production cut agreement for an additional month. International benchmark Brent crude was trading at $42.87 per barrel at 0608 GMT for a 1.34% increase after closing Friday at $42.30 a barrel. American benchmark West Texas Intermediate was at $39.94 a barrel at the same ...