Write a program that prompts the user to input number of calls and calculate the monthly telephone bills as per the following rule:

Minimum Rs. 200 for up to 100 calls.
Plus Rs. 0.60 per call for next 50 calls.
Plus Rs. 0.50 per call for next 50 calls.
Plus Rs. 0.40 per call for any call beyond 200 calls.

Source Code

calls = int(input("Enter number of calls: "))

if calls <= 100:
    bill = 200 
elif calls > 100 and calls <= 150:
    calls = calls - 100
    bill = 200 + (0.60 * calls)
elif calls > 150 and calls <= 200:
    calls = calls - 150
    bill = 200 + (0.60 * 50) + (0.50 * calls)
else:
    calls = calls - 200
    bill = 200 + (0.60 * 50) + (0.50 * 50) + (0.40 * calls)

print("Total bill amount is", bill)

Output

Enter number of calls: 350
Total bill amount is 315.0