Answer:
660 units of fish
Explanation:
Boatland's production = 150 units of wheat or 750 units of fish
opportunity cost of producing fish = 150/750 = 0.2 units of wheat
opportunity cost of producing wheat = 750/150 = 5 units of fish
Farmland's production = 750 units of wheat or 150 units of fish
opportunity cost of producing fish = 750/150 = 5 units of wheat
opportunity cost of producing wheat = 150/750 = 0.2 units of fish
If Boatland trades 90 units of fish in exchange for 80 units of wheat, its remaining production will be = 750 (maximum possible production of fish) - 90 (units traded) = 660 units of fish