For $8$ years, Janet saved $$900$ at the beginning of every month in a fund that earned $3\mathrm{.}5\%$ compounded annually.

a$.$ What was the balance in the fund at the end of the period?

$$0\mathrm{.}00$

Round to the nearest cent

b$.$ What was the amount of interest earned over the period?

$$0\mathrm{.}00$

Round to the nearest cent