Answer:
a. 2,142 million pounds of food
b. 4,284,000 people
Explanation:
Opportunity costs are the additional costs or benefits lost resulting from choosing one activity or investment over another alternative.
In this case, a person from North Korea could be working as a farmer instead of being a soldier. Opportunity cost per soldier = 1,800 pounds of food per year. Total opportunity cost of North Korea's army = 1,800 pounds x 1,190,000 soldiers = 2,142 million pounds of food
this is equivalent to feeding 2,142,000,000 / 500 = 4,284,000 people