Thomas saved $60 at the end of every month for 7 years in his bank account that earned 3.10% compounded monthly. a. What is the accumulated value of his savings at the end of the period? $5,546.24 $5,620.56 $51,997.85 $580.56 b. What is the interest earned over the period? O $520.56 O $5,620.56 $640.56 O $580.56