Untitled

public class WaterBillCalculator {
    public static double calculateWaterBill(int consumption) {
        double total = 0;
        if (consumption <= 10) {
            total = consumption * 5973;
        } else if (consumption <= 20) {
            total = 10 * 5973 + (consumption - 10) * 7052;
        } else if (consumption <= 30) {
            total = 10 * 5973 + 10 * 7052 + (consumption - 20) * 8669;
        } else {
            total = 10 * 5973 + 10 * 7052 + 10 * 8669 + (consumption - 30) * 15929;
        }
        double vat = total * 0.05;
        double environmentFee = total * 0.10;
        return total + vat + environmentFee;
    }

    public static void main(String[] args) {
        int consumption = 7; // số lượng tiêu thụ
        double totalBill = calculateWaterBill(consumption);
        System.out.println("Tổng cộng tiền thanh toán: " + totalBill);
    }
}