Generally, the salary in undergraduate tutor is relatively low, but in fact, college students are easy to get close to their children, and some parents also like to use college students as tutors. The salary is roughly as shown in the figure.

Moreover, your sister's salary as a tutor during the holiday is one of the gains, and the other is to gain experience in school, consolidate the knowledge she has learned, and realize that being a teacher is not so easy, so she can learn more gratitude.