Duke and pat collins have adjusted gross income of $358,000. they have itemized deductions of $20,000 consisting of $8,000 in medical expenses that exceed 10% of adjusted gross income, $3,000 in property taxes, $4,000 in housing interest, and $5,000 in miscellaneous itemized deductions that exceed 2 percent of adjusted gross income. what is the amount of their itemized deduction?