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 able to use tying to price checking account and ATM services,what is the profit-maximizing price to charge for the "tied" good?

A) $14
B) $10
C) $9
D) $8