An old lady, Maria, was caring for her grandson for the past few years and filing as Head of Household in order to claim him on her return. Due to a terrible accident, her grandson was killed on the previous year, the last year that she filed as Head of Household. Maria is age sixty-nine and makes $45,000 in taxable income on her Form 540. What is the amount of the Senior Head of Household Credit that she is eligible to take on her return