Answer:
See below.
Explanation:
This is a question that deals with comparative and absolute advantage different countries have in production. So lets summarize the information,
Country A
1 worker = 5 toasters
1 worker = 20 sweaters
Country B
1 worker = 3 toasters
1 worker = 18 sweaters
So lets see what happens when the countries do not specialize,
Country A
60 workers = 300 toasters
40 workers = 800 sweaters
Country B
60 workers = 180 toasters
40 workers = 720 sweaters
Opportunity cost for Country A is as,
4 sweaters per 1 toaster
Opportunity cost for Country B is as,
6 sweaters per 1 toaster
Toasters are cheaper to produce for Country A and sweaters are cheaper to produce for Country B.
When the specialize
Country A produces only 500 toasters
Country B produces only 1800 sweaters
After trade
Country A has, 310 toasters and 950 sweaters
Country B has, 190 toasters and 850 sweaters
When the countries trade they are able to consume more of each product and thus the specialization has helped both countries.
Total production of 1800 sweaters is more than if the countries produced individually. So is also the case with toasters.
Hope that helps.