Suppose the United States has two​ utilities, Commonweath Utilities and Consolidated Electric. Both produce 20 million tons of sulfur dioxide pollution per year.​ However, the marginal cost of reducing a ton of pollution for is ​$ per ton and the marginal cost of reducing a ton of pollution for is ​$ per ton. The​ government's goal is to cut sulfur dioxide pollution in half​ (by 20 million tons per​ year). If the government issues 10 million tradable pollution permits to each​ utility, what will be the cost of eliminating half of the pollution to​ society?