prompt = "\nPer favore inserisci la  tua eta'."
prompt += "\nInserisci 'quit' quando hai finito. "
answer = "Your price is: $"

while True:
	age = input(prompt)
	if age == 'quit':
		break
	age = int(age)

	if age < 3:
		price = 0
	elif age < 13:
		price = 10
	else:
		price = 15
	print(f"{answer}{price}")