Answer:
Step-by-step explanation:
Antonio used the value of money as a unit of account to compare the value of the two cars namely Super and Duper and come to the conclusion that Duper was cheaper to Super
Antonio saved $ 4000 in his checking account which he gave to the seller. This represent money's role as a store of value
Antonio write a check of the money he saved to the seller and the seller accepted it and gave him the car which fulfill the role of money as a medium of exchange.