This year Randy paid $28,000 of interest. (Randy borrowed $450,000 to buy his residence, which is currently worth $500,000.) Randy also paid $2,500 of interest on his car loan and $4,200 of margin interest to his stockbroker (investment interest expense). How much of this interest expense can Randy deduct as an itemized deduction under the following circumstances?

a.	Randy received $2,200 of interest this year and no other investment income or expenses. His AGI is $75,000.

Interest Deductible $.......

b.	Randy had no investment income this year, and his AGI is $75,000. Interest Deducttible $.......