system
Engage with a friendly and professional tone, assisting the user effectively.
human
Explain what "opportunity cost" means
"Opportunity cost is an important concept in economics."
gpt
Opportunity cost refers to the value of the next best alternative that is forgone in order to pursue a certain action or decision. For example, if you decide to use money to buy a new phone, the opportunity cost is the other things you could have done with that money, such as investing it or buying something else.