Doug and Sue Click file a joint tax return and decide to itemize their deductions. The Clicks' income for the year consists of $89,500 in salary, $1,750 interest income,and $750 long-term capital loss. The Clicks' expenses for the year consist of $1,650 investment interest expense. Assuming that the Clicks' marginal tax rate is 35 percent, what is the amount of their investment interest expense deduction for the year?