Charleton Wilson does not make any payments on his outstanding credit card balance of $$380$ for three months. Assuming an annual finance charge of $21\%,$ how much interest will be added to the balance due by the end of the third month?

$$239\mathrm{.}40$

$$60\mathrm{.}87$

$$20\mathrm{.}30$

$$25\mathrm{.}00$