Determine the Missing Information for the Following Line of Credit

Essay

Determine the missing information for the following line of credit.
Harold has a line of credit secured by the equity in his home. The limit on his line of credit is $85 000. Transactions for the period May 1 to September 30 are shown below. Harold owed $45 967.06 on his line of credit on May 1.
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Note: "-" indicates a negative balance.
Overdraft interest is 28.8% p.a. The line of credit interest is variable. It was 6.15% on May 1, 6.50% effective June 20, and 6.55% effective September 10.
a) Calculate the interest payments on May 31, June 30, July 31, August 31, and September 30.
b) What is the account balance on September 30?