The balance on a credit card, that charges an 18%

APR interest rate, over a 1 month period is given in

the following table:

Days 1-3: $150 (initial balance)

Days 4-20: $200

($50 purchase)

Days 21-30: $50

($150 payment)

What is the finance charge, on the average daily

balance, for this card over this 1 month period?

finance charge = $ [?]

Round to the nearest hundredth.