Python Functions

Please I need your help to solve this assignment. Thanks.

Assignment: Stadium Seating
There are three seating categories at a stadium. For a softball game, Class A seats cost $15,
Class B seats cost $12, and Class C seats cost $9. Write a program that asks how many tickets
for each class of seats were sold, and then displays the amount of income generated from ticket sales.
• Include at least three functions, one that retrieves the input from the user, one that calculates the total income based on the type and quantity of tickets, and one that displays the earnings.
• Pass the input values (# of class A tickets, # of class B tickets, # of class C tickets) from the input function to the calculate function. (Do not name your function "input" as this is a reserved word.)
• Pass the Total Income calculated in the calculate function to the display function.

This is “my program”
# This program calculates the income generated from ticket sales
# Class A seats cost $15, Class B seats cost $12, Class C seats cost $9
# mainline logic
def main():
intro() # call the intro function
readInput() # call readInput function
# This function displays some introductory messages
def intro():
print("\tWelcome to the Ticket Sales Program")
print("\tClass A seats cost $15")
print("\tClass B seats cost $12")
print("\tClass C seats cost $9")
print("\tYou will be asked to enter the number of tickets sold in each of the three categories")
print("\tThe program will then calculate the income generated from all the sales")
print()
raw_input("Press any Key when you are ready to begin")


# This function calculates the sales from the three categories
def calcSales(numClassA, numClassB, numClassC):
salesClassA = numClassA * 15
salesClassB = numClassB * 12
salesClassC = numClassC * 9
print("The income generated for Class A seats: $%7.2f") % salesClassA
print("The income generated for Class B seats: $%7.2f") % salesClassB
print("The income generated for Class C seats: $%7.2f") % salesClassC
totalSales(totalSales)

# This function outputs the income generated
def outputSales(Sales):
print("\nThe total income generated for the softball game is $%7.2f") % sales

# call the main function
main()

THIS IS THE FEEDBACK AFTER RUN
Python 3.2 (r32:88445, Feb 20 2011, 21:29:02) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>>
Welcome to the Ticket Sales Program
Class A seats cost $15
Class B seats cost $12
Class C seats cost $9
You will be asked to enter the number of tickets sold in each of the three categories
The program will then calculate the income generated from all the sales

Traceback (most recent call last):
File "C:\Python32\Assignments\Ch_3_8 .py", line 38, in <module>
main()
File "C:\Python32\Assignments\Ch_3_8 .py", line 8, in main
intro() # call the intro function
File "C:\Python32\Assignments\Ch_3_8 .py", line 20, in intro
raw_input("Press any Key when you are ready to begin")
NameError: global name 'raw_input' is not defined
>>>

The input function was removed in python 3. raw_input was renamed to input in python3. You're using python 3.

In other words, raw_input is gone and input works like raw_input did in python2.


**Note,
The problem description incorrectly states that input is a reserved word. You can reassign it. input is not a reserved word. For contrast, try
>>> True = 8