In 2018, marvin, a cash basis taxpayer, took a $2,000 itemized deduction for state income taxes paid. this increased his itemized deductions to a total that was $800 more than the standard deduction. in 2018, marvin received a $1,600 refund when he filed his 2018 state income tax return. marvin was in the 12% marginal tax bracket in 2018, but was in the 35% marginal tax bracket in 2019. how much must marvin include in his gross income for 2019?