Answer:
Antonio writes a check for $4,000: Medium of exchange;
Antonio can easily determine that the price of the super is more than the price of the Duper: Unit of account
Antonio has saved $4,000 in his checking account: store of value
Step-by-step explanation:
* Antonio writes a check for $4,000: as he writes the check to car dealer, money in this situation is acted like a medium of exchange, that is, an intermediate instrument that helps to facilitate the transaction between Antonio and car dealer.
* Antonio can easily determine that the price of the Super is more than the price of the Duper: In this situation, money works as a unit of account. As Super takes him more money to own than the Duper, thanks to the money price tag Antonio easily identifies that the Super is more expensive than the Duper.
* Antonio has saved $4,000 in his checking account:: the $4,000 is the amount of purchasing power'value Antonio has had, yet not used; which has been stored in the form of monetary value. So, under this circumstances, money is played a role as store of value.