Mark and Carrie are married, and they will file a joint return. They both work full-time, and their 2021 income totaled $89,000, all from wages. They have one dependent child, Aubrey (5). During the year, they spent $9,000 for Aubrey's child care. Neither Mark nor Carrie received any dependent care benefits from their employer. What amount may they use to calculate the Child and Dependent Care Credit?