A couple thinking about retirement decide to put aside $$12,500$ each year in a savings plan that earns $7\mathrm{.}50\%$ interest. In $9$ years they will receive a gift of $$89,500$ 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.$)$

Accumulated savings $

b$.$

If their goal is to retire with $$1,648,383$ of savings, how much extra do they need to save every year? $($Do not round intermediate calculations. Round your answer to $2$ decimal places.$)$