An automotive dealer borrowed $7500.00 from the Bank of Montreal on a demand note on May 13. Interest on the loan, calculated on the daily balance, is charged to the dealer's current account on the 13th of each month. The automotive dealer made a payment of $2300 on July 24, a payment of $3300 on October 1, and repaid the balance on December 1. The rate of interest on the loan on May 13 was 7% per annum. The rate was changed to 7.35% on August 1 and to 7.6% on October 1. What was the total interest cost for the loan