Answer:
(A)Unit of Account
Sean can easily determine that the whole sandwich, while twice as long as the half, is priced at less than twice as much
(B)Store of Value
Sean accumulates money in his savings account for future purchases
(C)Medium of Exchange
Sean buys his lunch with a $10 bill.
Step-by-step explanation:
(A) Sean can measure each type of sandwich and compare his options using the price.
(B) Sean bank account is composed of previous earning of Sean which was accumulated over time
(C) Both Sean and the cashier agree to exchange the sandwich, a consumer good, for the $10 currency
they would not agree on a paper wrote by Sean, It needs to be a $10 currency from the Fed.