An automotive dealer borrowed $9500.00 from the Bank of Montreal on a demand note on May 14. Interest on the loan, calculated on the daily balance, is charged to the dealer's current account on the 14th of each month. The automotive dealer made a payment of $2100 on July 23, a payment of $4500 on October 1, and repaid the balance on December 1. The rate of interest on the loan on May 14 was 8% per annum. The rate was changed to 8.25% on August 1 and to 8.75% on October 1.

What was the total interest cost for the loan?