The use of a dollar bill to buy a concert ticket represents the function of money as a: a. medium of exchange. b. unit of account. store of valuc. all of these. d. c. 8. Comparing how many dollars it takes you to run your car each year to annual earnings on a job instead of keeping track of costs in terms of gallons of gasoline and quarts of oil represents the use of money as a: a. means of payment. b. unit of account. c. store of purchasing power. d. form of plastic moncy Which of the following is not a store of value? a. Dollar bills. b. Credit card 9. c. Coins d. Gold Coins and dollar bills are money in the form of: a barter b. currency 10. c. capital stock d. investment.