Australian Income Tax Calculator 2011-2012

#!/usr/bin/python
#/home/clockworkpcasus/Documents/bin/weeklyTax.py

# Released under a GPLv3 Licence by Clockwork PC 2011
#
# www.clockworkpc.com.au
#
# You are entitled to the following four freedoms:
# Freedom 0: To run this program for any purpose
# Freedom 1: To study how this program works and change it to make it do what you wish
# Freedom 2: To redistribute copies so you can help your neighbour
# Freedom 3: To distribute copies of your modified version to others

weeklyPay = int(input("How much do you earn per week? "))
annualPay = weeklyPay * 52

if 0 < annualPay <= 6000:
  annualIncomeTax = 0
elif 6000 < annualPay <= 37000:
  annualIncomeTax = (annualPay - 6000)*0.15
elif 37000 < annualPay <= 80000:
  annualIncomeTax = 4650 + (0.3 * (annualPay - 37000))
elif 80000 < annualPay <= 180000:
  annualIncomeTax = 17550 + (0.37 * (annualPay - 80000))
elif annualPay > 180000:
  annualIncomeTax = 54550 + (0.45 * (annualPay - 180000))
else:
  print "Something has gone wrong"

weeklyTax = (annualIncomeTax / 52)

print "Your weekly pay is",weeklyPay
print "Your annual income is",annualPay
print "Your annual income tax is",annualIncomeTax
print "Your weekly tax is",weeklyTax