(1 point) Stereo Inc. sells a stereo system for $300 down and monthly payments of $40 for the next 4 years. If the interest rate is 1.5% per month, find: a) The cost of the stereo. Answer = Hint: The answer is a dollar amount and should include a dollar sign and have exactly two decimal places. b) The total amount of interest paid. Answer = Hint: The answer is a dollar amount and should include a dollar sign and have exactly two decimal places