Sean, who is single, received social security benefits of $8,080, dividend income of $12,510, and interest income of $2,020. Except as noted, those income items are reasonably consistent from year to year. At the end of 2021 , Sean is considering sellin stock that would result in an immediate gain of $10,040, a reduction in future dividends of $1,010, and an increase in future interest income of $1,510. What amount of social security benefits is taxable to Sean? Sean, who is single, received social security benefits of $8,080, dividend income of $12,510, and interest income of $2,020. Except as noted, those income items are reasonably consistent from year to year. At the end of 2021 , Sean is considering sellin stock that would result in an immediate gain of $10,040, a reduction in future dividends of $1,010, and an increase in future interest income of $1,510. What amount of social security benefits is taxable to Sean