43,000 - 11,000 = 32,000 pounds taxable @ 20%
32,000 x 20% =6,400 pounds in taxes payable
150,000 - 43,000 =107,000 pounds taxable @ 40%
107,000 x 40% =42,800 pounds in taxes payable
158,900 - 150,000 =8,900 pounds taxable @45%
8,900 x 45% =4,005 pounds in taxes payable
6,400 + 42,800 + 4,005 =53,205 pounds in taxes that Megan must pay.