Ok, I keep getting this error, please help. ZeroDivisionError: float division by zero

#Cheri Castro
#14January18
#Lesson 5 Dicussion

def main():
    print("Welcome to the monthly gas and milage tracker.") 
    end_program = 'no'
    counter = 1
    number = 0
    cost_pergal = 0.0
    total_gal = 0.0
    total_cost = 0.0
    beginning_milage = 0.0
    ending_milage = 0.0
    total_miles = 0.0
    miles_pergal = 0.0
    display_info(counter, number, ending_milage, beginning_milage, total_gal, total_cost, total_miles, miles_pergal)
    # So you initilize everything at the start of the main and then you call the display_info method
    # Lets jump down to that method

    while end_program == 'no':
      end_program, counter, number, cost_pergal, total_gal, total_cost, beginning_milage, ending_milage, total_miles, miles_pergal

      number = get_number()
      miles_pergal = get_mpg(number, cost_pergal, total_gal, total_cost, beginning_milage, ending_milage, total_miles, miles_pergal)

      end_program = input("Do you want to end the program?(Enter yes to end the program or no to continue with another calcualtion of miles per gallon).:") 

def get_number():
    number = int(input("How many months worth of gas do you want to calculate?: "))
    return number


def get_mpg(counter, number, cost_pergal, total_gal, total_cost, beginning_milage, ending_milage, total_miles, miles_pergal):
    for counter in range(number):
      cost_pergal = float(input("What was the cost per gallon?: "))
      total_gal = float(input("What were the total gallons?: "))
      total_cost = float(cost_pergal)*(total_gal)/(number)
      beginning_milage = float(input("What was the beginning milage?: "))
      ending_milage = float(input("What was the ending milage?: "))
      return number, cost_pergal, total_gal, total_cost, beginning_milage, ending_milage, total_miles, miles_pergal

def display_info(counter, number, ending_milage, beginning_milage, total_gal, total_cost, total_miles, miles_pergal):
    total_miles = float(ending_milage - beginning_milage)/ int(number)
    # So your first calculation, you divide by number at the end
    # But if you look back, number = 0 at the start, so now you are trying to divide by 0
    # which is what is causing your error
    miles_pergal = float(total_gal/ total_miles) * int(number)
    print("Your total cost was: " + total_cost)
    print("Your total miles traveled was: " + total_miles)
    print("Your total miles per gallon were: " + miles_pergal)

main()

def main():
    print("Welcome to the monthly gas and milage tracker.") 
    end_program = 'no'

    # As stated above i would remove this counter part
    counter = 0

    # All of these do not need to be initilised here
    # Its not code breaking but you are doing it again in the get_info() function
    cost_pergal = 0.0
    total_gal = 0.0
    total_cost = 0.0
    beginning_milage = 0.0
    ending_milage = 0.0
    total_miles = 0.0
    miles_pergal = 0.0

    # Again as stated above i would remove the get_number() function
    number = get_number()

    # So here is the reason why you are still getting 0's
    # You are calling this function but you are not storing any information
    # In the function below you get all the information from the user
    # But you do not bring those back to this main() function
    # Also you are sending information to the function but you dont need to
    # This function is simply taking user input, it doesnt need any values sent to it
    # So it should look more like this:
    # cost_pergal, total_gal, beginning_milage, ending_milage = get_info()
    get_info(cost_pergal, total_gal, beginning_milage, ending_milage, number)

    # So this one is actually more correct
    # Just again as stated above i would remove the counter and number arguments
    # But again you are sending info to the function that it does not need
    # It should look more like this:
    # total_cost, total_miles, miles_pergal = get_mpg(cost_pergal, total_gal, beginning_milage, ending_milage)
    total_cost, total_miles, miles_pergal = get_mpg(counter, number, cost_pergal, total_gal, total_cost, beginning_milage, ending_milage, total_miles, miles_pergal)

    # This is perfect, you have sent exactly the arguments that you need
    display_info(total_cost, total_miles, miles_pergal)

    # This while loop is actually in the wrong place, right now it doesnt really do anything
    # You need to put the methods from above into it so it runs them everytime the user
    # Says no to ending the program
    # For now i would remove this, get the code actually working, and then add it back
    while end_program == 'no':
      end_program, counter, number, cost_pergal, total_gal, total_cost, beginning_milage, ending_milage, total_miles, miles_pergal

      end_program = input("Do you want to end the program?(Enter yes to end the program or no to continue with another calcualtion of miles per gallon).:") 

# As stated above, i would remove this
def get_number():
    number = int(input("How many months worth of gas do you want to calculate?: "))
    return number

# Remove the for loop, but keep the inputs in this method and it should run perfectly
# Also like i said in the main(), you dont need the arguments here
# def get_info() is fine
def get_info(cost_pergal, total_gal, beginning_milage, ending_milage, number):
    counter = 0
    cost_pergal = 0.0
    total_gal = 0.0
    total_cost = 0.0
    beginning_milage = 0.0
    ending_milage = 0.0
    for counter in range(number):
      cost_pergal = float(input("What was the cost per gallon?: "))
      total_gal = float(input("What were the total gallons?: "))
      beginning_milage = float(input("What was the beginning milage?: "))
      ending_milage = float(input("What was the ending milage?: "))
    return cost_pergal, total_gal, beginning_milage, ending_milage 

# As i said in the main() function you are taking some arguments here that you dont need
# I would just use cost_pergal, total_gal, beginning_milage, ending_milage
# Remove the while loop while keeping whats inside it and it should work
def get_mpg(counter, number, cost_pergal, total_gal, total_cost, beginning_milage, ending_milage, total_miles, miles_pergal):
    counter = 0 
    while counter == number:
      total_cost = float(cost_pergal) * float(total_gal)
      total_miles = float(ending_milage) - float(beginning_milage)

      # This calculation is the wrong way around, should be total_miles / total_gal
      miles_pergal = float(total_gal)/float(total_miles)

      counter = counter + 1
    return total_cost, total_miles, miles_pergal

# This is perfect
def display_info(total_cost, total_miles, miles_pergal):
    print("Your total cost was: $ ", total_cost)
    print("Your total miles traveled was: ", total_miles)
    print("Your total miles per gallon were: ", miles_pergal)

main()