Computer Store

def calculate_taxes(price):
    return price * 0.2
def calculate_discount(total_price_with_taxes):
    return total_price_with_taxes * 0.1

total_price_without_taxes = 0

while True:
    price = input()
    if price == "special" or price == "regular":
        customer_type = price
        break
    price = float(price)
    if price <= 0:
        print("Invalid price!")
        continue
    total_price_without_taxes += price

if total_price_without_taxes == 0:
    print("Invalid order!")
else:
    total_taxes = calculate_taxes(total_price_without_taxes)
    total_price_with_taxes = total_price_without_taxes + total_taxes
    if customer_type == "special":
        discount = calculate_discount(total_price_with_taxes)
        total_price_with_taxes -= discount
    print("Congratulations you've just bought a new computer!")
    print(f"Price without taxes: {total_price_without_taxes:.2f}$")
    print(f"Taxes: {total_taxes:.2f}$")
    print("-----------")
    print(f"Total price: {total_price_with_taxes:.2f}$")