#name Yana
#date oct 3
#solution to program 8 from the textbook
#p. 115

#we will write one function 
#profit that has two formal parameters
#amount and price
#this function will calculate the profit from
#selling the tickets

#we write a main function that will ask user to enter
#the number of tickets for each category (class A $15 per ticket, 
#class B $12 per ticket, class C $9 per ticket)
#and prints the profit from each category

#we will declare three global constants to hold ticket price for 
#each category

A=15
B=12
C=9

def profit(amount, price):
	
	result = amount*price
	print(result)

def main():
	#part I: input

	classA = int(input("enter class A number of tickets "))
	classB = int(input("enter class B number of tickets "))
	classC = int(input("enter class C number of tickets "))
	
	#part II: function calls

	print("the profit from selling class A tickets is ")
	#ERROR don't do it: print(profit)

	#correct way to call the function:

	profit(classA, A)

	print("the profit from selling class B tickets is ")
	profit(classB, B)
	print("the profit from selling class C tickets is ")
	profit(classC, C)

	
main()