A single Taxpayer with no children, had taxable income of 150K in 2017, That taxable income amount included a $ 20 k gain on the sale of depreciable

A single Taxpayer with no children, had taxable income of 150K in 2017, That taxable income amount included a $ 20 k gain on the sale of depreciable real estate that he held for several years, and $10000 of the gain is due to prior tax depreciation. What is the amount of his gross tax liability for the year?