This year Randy paid $28,600 of interest on his residence. (Randy borrowed $458,000 to buy his residence, which is currently worth $508,000.) Randy also paid $2,700 of interest on his car loan and $4,500 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 $2,360 of interest this year and no other investment income or expenses. His AGI is $75,000. Answer is complete but not entirely correct. b. Randy had no investment income this year, and his AGl is $75,000