I don't know what her income is

Jenna works at the grocery store and earns $9 an hour. She is busy with extracurricular activities and only works 20 hours during the week. However, she picks up an eight-hour Sunday shift once a month, for which she earns time and a half. Jenna also lives at home and has health insurance under her mom's plan. She is expected to pay for her own car repairs, maintenance and gas, as well as her auto insurance, which costs $1,000 a year. Jenna wants to take a trip to Mexico with her friends next year, which will cost $1,500.