Please explain

Comprehensive Problem 4-57 (LO 4-1, LO 4-2, LO 4-3) (Static) The following information applies to the questions displayed below.] Demarco and Janine Jackson have been married for 20 years and have four children (no children under age 6 at yearend) who qualify as their dependents (Damarcus, Jasmine, Michael, and Candice). The couple recelved salary income of $105,000 and qualified business income of $10,000 from an investment in a partnership, and they sold their home this year. They initially purchased the home three years ago for $200,000, and they sold it for $250,000. The gain on the sale qualified for the exclusion from the sale of a principal residence. The Jacksons incurred $16,500 of itemized deductions (no charitable contributions), and they had $4,000 withheld from their paychecks for federal taxes. They are also allowed to claim a child tax credit for each of their children. However, because Candice was 18 years of age at year end, the Jacksons may claim a child tax credit for other qualifying dependents for Candice. (Use the tax rate schedules.) Comprehensive Problem 4-57 Part-a (Static) a. What is the Jacksons' taxable income, and what is their tax liability or (refund)? 2 Tax Rate Schedules