[SOLVED]Wrong Sum

[eluser]redraw[/eluser]
untuk seperti itu gimna caranya mas?
model sya kya gini :

Code:

function cetak_master()
    {
        $data = $this->fungsi->accept_data(array_keys($_POST));
        //$this->gl_model->gl_browse_trans($data);
        $data['tanggal_mulai'] = $_POST['tanggal_mulai'];
        $this->session->set_userdata('tanggal_mulai', $this->input->post('tanggal_mulai'));
        
        $data['tanggal_sampai'] =  $_POST['tanggal_sampai'];
        $this->session->set_userdata('tanggal_sampai', $this->input->post('tanggal_sampai'));


        $data['detail'] = $this->gl_model->gl_browse_trans();
        $data['detail_nomer'] = $this->gl_model->ambil_nomer();
        $data['detail_batasan'] = $this->gl_model->ambil_batasan_list();
        $this->load->view('haluser/cetak_trans', $data);
    }

model saya :

Code:

function ambil_master()
    {        
        
       $tanggal_mulai = $this->input->post('tanggal_mulai');
       $tanggal_sampai = $this->input->post('tanggal_sampai');
        
        $sql = "SELECT gl_master.master_id, gl_master.no_bukti, gl_master.tanggal, gl_akun.code, gl_akun.account,"
               ."gl_master.keterangan, gl_master.nilai, if(gl_master.jenis='d', gl_master.nilai,0) as debet, if(gl_master.jenis='k', gl_master.nilai,0) as kredit,"
               ."gl_master.jenis, gl_master.awal, gl_master.aktif "
               ."FROM gl_master JOIN gl_akun "
               ."ON gl_akun.code = gl_master.code "
               ."WHERE gl_master.tanggal BETWEEN '".$tanggal_mulai."' AND DATE '".$tanggal_sampai."'"
               ."order by gl_master.tanggal,gl_master.no_bukti,gl_master.jenis ASC";
        $data = $this->db->query($sql);
        return $data;
        
      }