Troy's financial records for the year reflect the following: Interest income from bank savings account Taxable annuity receipts City ad valorem property tax on investments Investment interest expense $1,640 3,280 246 5,740 Calculate Troy's net investment income and his current investment interest deduction. How is a deduction for any potential excess investment interest treated? Troy's net investment income is $ investment interest expense not deducted this year is and his investment interest deduction is $ Any potential excess