Scenario: Countries A and B

Two countries, A and B$,$ currently produce two goods, wheat $($W$)$ and steel $($S$).$ They each have a linear production possibility frontier in both goods. For Country $A,$ if it spends all of its available resources to produce wheat, it can produce $500$ units of wheat and zero units of steel. If it uses all of its resources to produce steel it can produce $250$ units of steel and zero units of wheat. For Country B$,$ if it spends all of its available resources producing wheat, it can produce $400$ units of wheat, and if it spends all of its resources on the production of steel, it can produce $400$ units of steel.