Practice Question number 3: Karl (end of notes)

Hi, In the answer workings to practice question 3, there is: 41,700 x 20% = 8,340 95,300 x 40% = 38,120 2,000 @ 0% = 0 15,000 @ 33.75% = 5,062 13,000 @ 39.35 % = 5,116 Income Tax Liability = 56,288 Is this a typo? Because after adding these numbers up I have 56,638. Or have a missed something? Thank you for the help. Charley