How Free trade affects welfare in an Exporting Country. Price of steel Domestic supply Consumer surplus before trade A Price after World trade B brice PI rice before trade Producer surplus Domestic before trade d eman 0 Quanti of steelPrice of Steel 0 Quantity of Steel World price Domestic demand How Free Trade Affects Welfare in an Exporting Country... Domestic supply Price after trade Price before trade A Consumer surplus before trade B C Producer surplus before trade