On a production possibilities frontier, how is the opportunity cost of one more unit of a commodity per time period measured?

Question

Quizplus · Accepted Answer

The opportunity cost of producing one more unit of a commodity per time period is measured by the amount of the other commodity that must be sacrificed. This is because the production possibilities frontier represents the tradeoff between producing one good and producing another. Thus, the opportunity cost of producing more of one good is the quantity of the other good that must be given up.

On a Production Possibilities Frontier, How Is the Opportunity Cost