A couple thinking about retirement decide to put aside $2,900 each year in a savings plan that earns 9% interest. In 15 years they will receive a gift of $21,000 that also can be invested. a. How much money will they have accumulated 30 years from now? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Accumulated savings $ b. If their goal is to retire with $790,000 of savings, how much extra do they need to save every year? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Additional annual savings needed $