Sean, who is single, received social security benefits of $8,160, dividend income of $12,530, and interest income of $2,040. Except as noted, those income items are reasonably consistent from year to year. At the end of 2021 , Sean is considering selling stock that. would result in an immediate gain of $10,080, a reduction in future dividends of $1,020, and an increase in future interest income of \$1,520. What amount of social security benefits is taxable to Sean