public boolean addProduct(String title, int count, double price)
    {
        if (title.isEmpty())
            return false;

        if (count <= 0)
            return false;

        if (price <= 0)
            return false;

        if (taxes.length > 4)
            return false;

        Product product = new Product(title, count, price, this.taxes);
        this.products.add(product);

        return true;
    }