Scenario 16-5 Assume That a Local Bank Sells Two Services, Checking Accounts

Scenario 16-5
Assume that a local bank sells two services, checking accounts and ATM card services. Mr. Donethat is willing to pay $8 a month for the bank to service his checking account and $2 a month for unlimited use of his ATM card. Ms. Beenthere is willing to pay only $5 for a checking account, but is willing to pay $9 for unlimited use of her ATM card. Assume that the bank can provide each of these services at zero marginal cost.
-Refer to Scenario 16-5.If the bank is unable to use tying,what is the profit-maximizing price to charge for a checking account?

A) $13
B) $9
C) $8
D) $5