Sheridan Service has a line of credit loan with the bank. The initial loan balance was $$7000\mathrm{.}00.$ Payments of $$2500\mathrm{.}00$ and $$3000\mathrm{.}00$ were made after four months and nine months respectively. At the end of one year, Sheridan Service borrowed an additional $$4000\mathrm{.}00.$ Eight months later, the line of credit loan was converted into a collateral mortgage loan. What was the amount of the mortgage loan if the line of credit interest was $5\%$ compounded monthly?