Respuesta :
Opportunity cost refers to a particular thing that is given up in order to acquire another thing. Choices have to be made and something has to be given up because resources are scarce. In the question given above, Gretchen gave up buying two jeans, she bought one instead so that she can buy a guitar amplifier. The jeans, which should have cost $50 that she gave up and did not buy is the opportunity cost in this case.
"In the end, she decided she would buy one pair of jeans instead of the two pairs of jeans she had planned."