Use the unpaid balance method to find the finance charge on the credit card account. Last? month's balance, the? payment, the annual interest? rate, and any other transactions are given.

Last? month's balance, ?$450 ?

Payment, ?$300

Interest? rate, 19.3 ?%

Bought plane? ticket, ?$160

Bought? luggage, ?$145

Paid hotel? bill, ?$180

The finance charge is ?$