Electricity bill program in python

 print("Program to calculate Electricity bill-")
unit=int(input("Enter Number of Units Consumed: "))
if(unit>500):
    amount=unit*9.25
    surcharge=80
elif(unit>=300):
    amount=unit*7.25
    surcharge=70
elif(unit>=200):
    amount=unit*5.25
    surcharge=50
elif(unit>=100):
    amount=unit*3.75
    surcharge=30
else:
    amount=unit*2.25
    surcharge=20
billtotal=amount+surcharge
print("Electricity Bill",billtotal)
input()