(Figure: The Market for Apple AirPods) Use Figure: The Market for Apple AirPods. Suppose a country opens up to free trade. If the world price of Apple AirPods is $120, producer surplus: Price $140 130 120 110 100 90 96 De 0 100 150 200 250 300 Quantity (thousands) Odecreases by $1.5 million. Oincreases by $2.5 million. increases by $750,000. Odecreases by $2.5 million