Oiver, who is single, recelved social security benefits of $8,640, dividend income of $12,660, and interest income of $2,170. Except as noted, those income items are reasonably consistent from year to year. At the end of 2022 , Oliver is considering selling stock that would result in an immediate gain of $10,340, a reduction in future dlvidends of $1,085, and an increase in future interest income of $1,585. Required: What amount of social security benefits is taxable to Oliver