# Note: "pass" doesn't do anything, it's just a placeholder.
# Delete pass when you add your code.

# Display all items in cart with prices and total
def display_cart(cart):
    # TODO: Show numbered list of items
    # TODO: Calculate and show total
    pass

# Add item to cart or update if exists
def add_to_cart(cart, item, price):
    # TODO: Check if item exists
    # TODO: Add or update price
    # TODO: Return True if successful
    pass

# Remove item by position number
def remove_from_cart(cart, item_number):
    # TODO: Convert display number to actual position
    # TODO: Remove item and return its price
    pass

# Calculate total price of all items
def calculate_total(cart):
    # TODO: Sum all prices in cart
    pass

# Main program
def main():
    cart = {}  # Empty dictionary to store items and prices

    while True:
        # TODO: Show menu
        # TODO: Get user choice
        # TODO: Handle each menu option
        pass

main()