获取数组到字符串转换错误

Question

我收到数组到字符串转换的错误。这是我的控件

public function report()
{
    $from=$this->input->post('from_date');
    $to = $this->input->post('to_date');
    $data['result']= $this->Account_model->get_report($from,$to)->result();
    $data['total'] = $total= $this->Account_model->get_total_amount($from,$to)->result();
    var_dump($total);
    $this->load->view('report_payment_details',$data);

}

这是我的模特

public function get_total_amount($from,$to)
{
    $this->db->join('payment','payment.order_id=services.id','left');
    $this->db->select('services.id,sum(payment.actual_amount) as total_amount');
    $this->db->join('customer','customer.id=services.customer_id');
    $this->db->order_by('services.id','desc');
    $this->db->where('date >=', $from);
    $this->db->where('date <=', $to);
    return $this->db->get('services');

这是我的观点

<td><?php echo $total; ?></td>  

这里我想获得两个日期的总金额，但是得到数组到字符串转换的错误