Mickey works for an advertising agency. He typically works in his employer's office from 9am to 5pm, and then he comes home and works for an additional 2 hours in his home office. His home office is 200 sq. ft. When Mickey is not working in the home office during the day, Mickey's son uses the home office to do homework and study. What amount can Mickey deduct for his home office assuming he uses the safe harbor method to calculate the deduction?