The graph below shows a market with a certain externality. S denotes the private cost of producers and D denotes the private value of consumers in this market. Without any intervention the total surplus is equal to P S + External Cost K H S E C A D O Q O (KGO) O (KIE) O (KGO) - (IJG) O (KIE) - (JIG)The graph below shows a market with a certain externality. S denotes the private cost of producers and D denotes the private value of consumers in this market. Without any intervention the total surplus is equal to P S + External Cost K H S E C A D O Q O (KGO) O (KIE) O (KGO) - (IJG) O (KIE) - (JIG)