**Soldato**

Country X produces 300 units of tea and 200 units of cotton.

Country Y produces 400 units of tea and 400 units of cotton.

Assuming constant returns to scale, I have to calculate (if each country were to specialize in the production of the commodity for which it has a comparative advantage) what would be the changes in total output of the two commodities?

Obviously, I've realized that X should specialize in tea (2/3 OC) and Y in cotton (for trade to take place) but I'm not sure what to do next. When a country specializes in a good, does it ONLY produce that good and thus produce twice as much?

In which case, X would produce 600 tea and Y 800 cotton.

Therefore, 600-400 = +200 (tea)

800-200 = +600 (cotton)

This can't be right!