4 . Total economic surplus The following diagram shows supply and demand in the market for laptops. Use the black point (plus symbol) to indicate the equilibrium price and quantity of laptops. Then use the green point (triangle symbol) to fill the area representing consumer surplus, and use the purple point (diamond symbol) to fill the area representing producer surplus. 150 Demand 135 Equilibrium 120 A 105 30 Consumer Surplus 75 O PRICE (Dollars per laptop) Producer Surplus 45 30 15 Supply 50 100 150 200 250 300 350 400 450 500 QUANTITY (Millions of laptops) Total surplus in this market is $ million. Grade It Now Save & Continue Continue without saving