how to find total price

I don't know how to get the all total price of the product that the customer bought from my system. the price of each item I can get but the price of all the item that have been choose i can't get the output. I'm using python.

Below is my code:

#below is the price of products

shopping_cart = {}
option = 1

while option!= 0:
    option = int(input("What type of milk you want to purchased: "))

    if option == 1:
       print("coke")
       qnty = int(input("Enter the quantity: "))
       total = qnty*8.49
    elif option == 2:
         print("dutch lady")
         qnty = int(input("Enter the quantity: "))
         total = qnty*8.50
    elif option == 3:
         print("fanta")
         total = qnty*3.00
    elif option == 4:
         print("Yoghurt")
         qnty = int(input("Enter the quantity: "))
         total = qnty*16.50
    elif option == 5:
         print("pepsi")
         qnty = int(input("Enter the quantity: "))
         total = qnty*18.50
    elif option == 6:
         print("beer")
         qnty = int(input("Enter the quantity: "))
         total = qnty*20.70
    else:
        ("Not found")

def totalcart (pr,qnty):       #is my code correct here?
    totalcart = (pr * qny)
    return total
print("The total price in your cart is ", (total))
break
print("Come Again")

Just putting ("Not found") as a statement doesn't print anything. You need to add your item total into total_cost immediately after the print statement. There's no point defining a function, since you don't call the function. So, replace everything after that last "else:" with this:

    else:
        total = 0
        print("Not found")
    total_cost += total

print("The total price in your cart is RM ", total_cost)
print("Please Come Again")