Suppose that a worker in Shipville can produce either 5 units of oats or 20 pounds of tuna per year, and a worker in Grainland can produce either 20 units of oats or 5 pounds of tuna per year. There are 20 workers in each country. No trade occurs between the two countries. Shipville produces and consumes 50 units of oats and 200 pounds of tuna per year while Grainland produces and consumes 200 units of oats and 50 pound of tuna per year. If trade were to occur, Shipville would trade 60 pounds of tuna for 60 units of oats. If Shipville now completely specializes in tuna production, how many pounds of tuna could it now consume along with the 60 units of imported oats?