i'm trying to include a tax calculation as a salary rule that will calculate the tax depending on the amount earned. but i get an error. can someone help me identify what is wrong 

a = 235000
b = 335000
c = 410000
d = 10000000
result = 0;
result1 = 0;
result2 = 0;
result3 = 0;
result4 = 0;
result5 = 0;

if (contract.wage < a):
    result1 = 0;
if (contract.wage > a and contract.wage <= b):
    result2 = 0.1 * (contract.wage -c)
elif (contract.wage > b) :
    result2 =  (0.1 * ( b - a))
if (contract.wage > b and contract.wage <= c):
    result3 = (0.2 * (contract.wage - b))
elif (contract.wage > c ):
     result3 = (0.2 * (c -b))
if (contract.wage > c and contract.wage <= d):
    result4 = (0.3 * (contract.wage - c))
if (contract.wage > d ):
    result5 = (0.4 * (contract.wage - d))
    result6 = (0.3 * (d - c))
    
result = result1 + result2 + result3 + result4 + result5+ result6