Assume you are buying an insurance policy. The insurance policy is offering an annuity of $30,000 for 20 years that begins on your 66th birthday. If today is your 40th birthday and the opportunity cost is 5% per annum, how much should you pay for this insurance policy today? Present your answer as a whole number to two decimals (including the $ symbol) and a positive value, e.g. $3210.65 (25\% marks will be deducted if the $ symbol is not provided)