Matilda works for a company with 1,000 employees. The company has a hospitalization insurance plan that covers all employees. However, the employee must pay the first $3,000 of his or her medical expenses each year. Each year, the employer contributes $1,500 to each employee's health savings account (HSA). Matilda's employer made the contributions in 2018and 2019, and the account earned $100 interest in 2019. At the end of 2019, Matilda withdrew $3,100 from the account to pay the deductible portion of her medical expenses for the year and other medical expenses not covered by the hospitalization insurance policy. As a result, Matilda must include in her 2019gross income: