You have $$500,000$ in an IRA $($Individual Retirement Account$)$ at the time you retire. You have the option of investing this money in two funds: Fund A pays $1\mathrm{.}1\%$ annually and Fund B pays $6\mathrm{.}1\%$ annually. How should you divide your money between Fund A and Fund $B$ to produce an annual interest income of $$21,000?$

You should invest $ $$ in Fund A and $ $$ in Fund B$.$

$N$ an example

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