Brice has been receiving annuity payments from her $401(k)$ plan for many years. She was $60$ years old when the annuity began and had a life expectancy of $85$ years old. The cost of the annuity was $$150,000$ and the expected return was $$465,000.$ She is now $93$ and received $$15,000$ of annuity payments. Calculate the taxable portion of the annuity.

A$)$ $$7,143$

B$)$ $$4,839$

C$)$ $$15,000$

D$)$ $$0$