A financial consultant firm has presented you with an investment opportunity that will give you the following stream of cash flows: nothing for the next $5$ years; starting at the following year, an amount of $$5,000$ per year until year $14$; and after that year, an amount of $$8,000$ per year until year $21.$ If your required rate of return $($APR$)$ is $8\%$ compounded annually, what is the future value at the end of year $21$ of these cash flows?