Chapter 9, Problem 4DQ

In 2017, Emma purchased an automobile, which she uses for both business and personal purposes. Although Emma does not keep records as to operating expenses (e.g., gas, oil, and repairs), she can prove the percentage of business use and the miles driven each year. In March 2019, Emma seeks your advice as to what income tax benefit, if any, she can derive from the use of her automobile. What would you suggest?