Which is an example of money being used as a unit of account?
O A customer buys a burger, fries, and a medium diet cola for $6.95.
O A restaurant's profits for the week of October 3 to October 10 are $1,250.
O A customer receives $3.05 in change and returns the next day to make another purchase.
O A restaurant sells a large ice cream sundae and charges the customer's debit card.