Linda borrowed $$19,000$ on August $17$th$.$ She paid $$4,500$ on November $11$th$,$ $$5,500$ on December $8$th$,$ and the balance on February $21$st$.$ The rate of interest on the loan was $8\mathrm{.}5\%.$ How much did Linda pay on February $20$th$?$ Use the declining balance method.