You bought two new CDs with the last 30 in your checking account and your next payday is on Monday. What is the opportunity cost of these CDs?

The opportunity cost of buying the two new CDs with your last $30 is the alternative uses of that money, such as saving it for future expenses or using it to purchase necessities before your next payday. Additionally, it may limit your ability to cover any unexpected costs that arise before you receive your next paycheck. Essentially, the opportunity cost reflects the potential benefits you forgo by choosing to spend your money on the CDs instead of saving or using it elsewhere.