Assume the United States is a large consumer of steel, able to influence the world price. Its demand and supply schedules are respectively denoted by Dus and Sus in Figure 42. The overall (United States plus world) supply schedule of steel is denoted by Sus.. Figure 4.2. Import Tariff Levied by a Large Country 8 550 475 450 325 0 5 10 O $450, 5 tons, 60 tons, 55 tons O $475, 10 tons, 50 tons, 40 tons O $525, 5 tons, 60 tons, 55 tons 20 O $630, 30 tons, 30 tons, 0 tons 30 40 Consider Figure 4.2. With free trade, the United States achieves market equilibrium at a price of Sus 50 55 Sus W.1 Sus+ w Dus Tons of Steel At this price, of steel are produced by U.S. firms, are bought by U.S. buyers, and are imported.