This year Randy paid $30,850 of interest on his residence. (Randy borrowed $488,000 to buy his residence, and it is currently worth $538,000.) Randy also paid $3,450 of interest on his car loan and $5,625 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 $2,960 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 deductible: