Required information [The following information applies to the questions displayed below.] This year Randy paid $30,700 of interest on his residence. (Randy borrowed $486,000 to buy his residence, which is currently worth $536,000.) Randy also paid $3,400 of interest on his car loan and $5,550 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 $2,920 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