On February 1, the balance is your account is $516.81. On july 1, you deposit $310.90. Your bank pays 6.25% interest. What is the amount in your account on July 1?
I believe it is $879.44 because 516.81+310.90=827.71 and then multiply that by 0.0625 and you get 51.731875 and so add that to 827.71 and you get 879.441875 and round that to $879.44