4.Write a Python program to input electricity unit charges and calculate total electricity bill according to the given condition:

For first 50 units Rs. 0.50/unit
For next 100 units Rs. 0.75/unit
For next 100 units Rs. 1.20/unit
For unit above 250 Rs. 1.50/unit
An additional surcharge of 20% is added to the bill

Static 

unit = 150
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(“Total Bill is :- “,total_amt)

Output :- 

Dynamic

unit = int(input(“Enter the total unit :- “))
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(“Total Bill is :- “,total_amt)
 

Output :-