Answer:
C. $500
Step-by-step explanation:
Money demand can be defined as the part of an assets in which a person is ready to hold as cash . The money can however be used to purchase goods or services.
Money demand can be denoted as
= Cash balance + Checking account balance.
Given that;
Cash balance = $200
Checking account balance = $300
Money demand = $200 + $300
Money demand = $500
Therefore, Joan's money demand is $500.