public double calculateTotal(double price, int item) {
        return price * item;
    }
    
    public double calculateTotal(double price, int item, double discount) {
        double total = price * item;
        return total - (total * (discount / 100));
    }

    public double calculateTotal(double[] prices) {
        return calculateTotal(prices, 0);
    }

    public double calculateTotal(double[] prices, double discount) {
        double total = 0;
        for (double price : prices) {
            total += price;
        }
        return total - (total * (discount / 100));
    }