Mercedes is an employee of MWH company and drives her car 12,000 miles a year for business and 3,000 miles a year for commuting and personal use. She is not reimbursed by her employer. She wants to claim the largest tax deduction possible for business use of her car, before any limitations on itemized deductions. Her total auto expenses for 2013 are as follows:
Gas, oil, and maintenance $ 4,600
Interest on car loan 500
Parking fees and tolls (100% business) 130
what is Mercedes's total 2013 deduction for automobile use ?