Sheridan Service has a line of credit loan with the bank. The initial loan balance was $$$$6000.$ Payments of $$$$2000$ and $$$ $3000$were made after four months and nine months respectively. At the end of one$$ year, Sheridan Service borrowed an additional $$$$4000.$ Seven months$$ 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 $6\%$ compounded monthly

the amount of loan is$?$