Write a Python Program to find the Bill

unit = float(input("Enter total units consumed:"))

if unit <= 50:
    amt = unit * 0.50;
elif unit <= 150:
    amt = 25 + ((unit-50) * 0.75);
elif unit <= 250:
    amt = 100 + ((unit-150) * 1.20);
else:
    amt = 220 + ((unit-250) * 1.50);
sur_charge = amt * 0.20;
total_amt  = amt + sur_charge;
print("Electricity Bill = Rs., total_amt);