Answer:
The answer to the three fill in the banks as per order given in question are- store of value , unit of account , medium of exchange.
Step-by-step explanation:
When $500 are kept in piggy bank to buy laptop, it illustrates the store of value function of money. This is a function where money is kept or stored to purchase some item in the future, given money doesn't lose its purchasing power .
The $500 price of laptop shows the unit of account function of money , where money is the standard numerical of measurement for the goods and services or any other transaction in the market.
The $500 which was used to buy the laptop shows the medium of exchange function of money , where money is used as intermediary for exchange of goods and services.