ABC Company negotiated a $250,000 revolving line of credit with the Bank of Montreal at prime plus 3%. On the twentieth of each month, interest is calculated (up to but not including the twentieth) and deducted from the company's savings account. If the initial loan advance of $25,000 on July 3 was followed by a further advance of $40,000 on July 29, how much interest was charged on July 20 and August 20? The prime rate was at 4% on July 3 and fell to 2.75% on August 5. (Round your answer to two decimal places.)

The amounts of interest charged on July 20 and August 20 were $ and $ respectively.