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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); } }
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