Assume that you contribute $150 per month to a retirement plan for 20 years. Then you can increase the contribution to $250 per month for another 20 years, and finally, $400 per month for the last 10 years. Given a 7 percent interest rate, what is the value of your retirement plan after the 50 years? Note: Do not round intermediate calculations and round your final answer to 2 decimal places. Assume that you contribute $150 per month to a retirement plan for 20 years. Then you can increase the contribution to $250 per month for another 20 years, and finally, $400 per month for the last 10 years. Given a 7 percent interest rate, what is the value of your retirement plan after the 50 years? Note: Do not round intermediate calculations and round your final answer to 2 decimal places