A couple thinking about retirement decide to put aside $27,500 each year in a savings plan that earns 6.40% interest. In 10 years they will receive a gift of $140,000 that also can be invested. a. How much money will they have accumulated 27 years from now? (Do not round intermediate calculations. Round your answer to 2 decimal places.) b. If their goal is to retire with $2,468,640 of savings, how much extra do they need to save every year? (Do not round intermediate calculations. Round your answer to 2 decimal places.)