A loan of amount $$15560\mathrm{.}21$ is repaid in $15$ annual payments beginning $1$ year after the loan is made. The first $6$ payments are $$1000$ each, and the final $9$ payments are each $$2000.$ Interest is at an effective annual rate of $5\mathrm{.}1\%.$ What is the amount of the principal repayment in the $6$th payment?