andi qualifies for a home deduction. The amount of space devoted to business use is 400 square feet of the total 2,000 square feet of her home. Randi's mortgage interest and property taxes in total are $1,600. Other deductions properly allocated to the home office total $300. In addition, Randi purchases and uses supplies costing $200 during the year. Assume Randi earns income of $3,400 for the year before deducting any home office or supplies deduction.