Tourist Shop [Python]

budget = float(input())
money_left = budget
money_spent = 0
product_counter = 0

product = input()

while product != "Stop":
    product_counter += 1
    price = float(input())

    if product_counter % 3 == 0:
        price *= 0.5
    if price > money_left:
        money_needed = price - money_left
        print("You don't have enough money!")
        print(f'You need {money_needed:.2f} leva!')
        break

    money_left -= price
    money_spent += price
    product = input()

if product == "Stop":
    print(f'You bought {product_counter} products for {money_spent:.2f} leva.')