title: Stuck on a stadium python code
body: <p>Hi so I am a beginner in python and I am a little stuck on a problem I have for class and would like some guidance on this.
  The problem for class is:Stadium Seating: There are three seating categories at an athletic stadium. For a baseball game, Class A seats cost $15 each, Class B seats cost $12 each, and Class C seats cost $9 each. Create a python program that allows the user to enter the number of tickets sold for each class. The program should be able to display the amount of income generated from each class of ticket sales and the total revenue generated.
  Add input validation for number of tickets so that only numbers are allowed. Your program must not let the rest of the code run with invalid input.</p>
  
  <p>now I got most of it to work but for some reason my income 2 and 3 are not multiplying the number of tickets for the price instead it's just writing the number of tickets that many times from the price.It seems to be only effecting the Class B and C</p>
  
  <p>Here is my code</p>
  
  <pre><code>sales1=input("Enter number of tickets sold for Class A seats:")
  #Validating sale
  while not sales1.isnumeric():
      print("INVALID INPUT:Please enter a number:")
  
  #Convert sales to a number
  sales1 =int(sales1)
  
  sales2=input("Enter number of tickets sold for Class B seats:")
  #Validating sale
  while not sales2.isnumeric():
      print("INVALID INPUT:Please enter a number:")
  
  #Convert sales to a number
  sales =int(sales2)
  
  sales3=input("Enter number of tickets sold for Class C seats:")
  #Validating sale
  while not sales3.isnumeric():
      print("INVALID INPUT:Please enter a number:")
  
  #Convert sales to a number
  Sales2 =int(sales3)
  
  #Income
  
  income1 = int(sales1 * 15)
  print("Sales for Class A:$" , end="")
  print(income1)
  income2 = int(sales2 * 12)
  print("Sales for Class B:$" , end="")
  print(income2)
  income3 = int(sales3 * 9)
  print("Sales for Class C:$" , end="")
  print(income3)
  
  #Total 
  
  Total = int(income1 + income2 + income3)
  print("Total revenue from ticket sales:$")
  print (total)
  </code></pre>
  
  <p>my outcome just looks like this</p>
  
  <p>Enter number of tickets sold for Class A seats:1
  Enter number of tickets sold for Class B seats:1
  Enter number of tickets sold for Class C seats:1
  Sales for Class A:$15.
  Sales for Class B:$111111111111
  Sales for Class C:$111111111</p>