Cannot Pass More than two variable to view

Hello,
 I try to get total of price column in personal assets table. But I have below error.. 

A PHP Error was encountered
Severity: Notice
Message: Trying to get property of non-object
Filename: employee/inventory.php
Line Number: 61
Backtrace:
File: C:\wamp64\www\MY\admin\application\views\employee\inventory.php
Line: 61
Function: _error_handler
File: C:\wamp64\www\MY\admin\application\controllers\Employee.php
Line: 223
Function: view
File: C:\wamp64\www\MY\admin\index.php
Line: 315
Function: require_once

My Model: 

PHP Code:

<?php

Class Employee_model extends CI_model
{
    public function __construct()
    {
        parent:: __construct();
    }

public function view_data($id)
    {
        $query = $this->db->query("SELECT
               sgh.employee.id,
               sgh.employee.employee_name,
               sgh.employee.designation,
               sgh.employee.join_date,
               sgh.employee.b_day,
               sgh.employee.address,
               sgh.employee.mobile_number,
               sgh.employee.photo,
               sgh.company.company_name,
               sgh.employee.company_id
               FROM
               sgh.company,
               sgh.employee WHERE sgh.employee.company_id=sgh.company.id AND sgh.employee.id='$id'");
        $employee_data = $query->row();
        return $employee_data;

    }

    public function view_inventory($id){
        $query = $this->db->query("SELECT sgh.inventory.id,
                                    sgh.inventory.item_name,
                                    sgh.inventory.price,
                                    sgh.inventory.qty,
                                    sgh.inventory.serial_number,
                                    sgh.inventory.product_key,
                                    sgh.employee.id,
                                    sgh.employee.employee_name
                                  FROM sgh.inventory,
                                  sgh.employee WHERE sgh.inventory.employee_id=sgh.employee.id AND sgh.employee.id='$id'");
        $item_data = $query->result_array();
        return $item_data;
    }

    function employee_spends($id)
    {
        $query = $this->db->query(" SELECT SUM(price) FROM inventory WHERE employee_id='$id'");
        $row = $query->row();
        return $row;
    }
} 


This My Controller

PHP Code:

function personal_inventory($id)
    {
        $employee_data["row"] = $this->Employee_model->view_data($id);
        $inventory_data["item"] = $this->Employee_model->view_inventory($id);
        //Total spends for current employee
        $inventory_data["total"] = $this->Employee_model->employee_spends($id);
        var_dump( $inventory_data["total"]);
       // var_dump( $inventory_data);
        if ($inventory_data["item"]== null) {
            $this->load->view('includes/header');
            $this->load->view('includes/top_header');
            $this->load->view('includes/left_nav');
            $this->load->view('error_page/no_records', $employee_data);
            $this->load->view('includes/footer');
            $this->load->view('includes/settings');
        } else {
            $this->load->view('includes/header');
            $this->load->view('includes/top_header');
            $this->load->view('includes/left_nav');
            $this->load->view('employee/inventory', $inventory_data);
            $this->load->view('includes/footer');
            $this->load->view('includes/settings');
        }
    } 


This is my view

PHP Code:

<!-- Content Wrapper. Contains page content -->
<div class="content-wrapper">
    <!-- Content Header (Page header) -->
    <section class="content-header">
     <h2>Personal Inventory Area</h2>
    </section>
    <!-- Main content -->
    <section class="content">
        <div class="row">
            <div class="col-xs-12">
                <div style="margin-bottom: 10px;" >
                        <a href="<?= base_url() ?>employee/employee_list/" class="btn btn-info btn-lg">Back
                            to List</a>

                </div>
                <div class="box">
                    <div class="box-header">
                        <h3 class="box-title">Inventory Items</h3>
                    </div>
                    <!-- /.box-header -->
                    <div class="box-body">
                        <table id="example1" class="table table-bordered table-striped table-hover">
                            <thead>
                            <tr>
                                <th>Item Name</th>
                                <th>Price</th>
                                <th>Quantity</th>
                                <th>Serial Number</th>
                                <th>Product Key</th>

                            </tr>
                            </thead>
                            <tbody>
                            <?php
                            foreach ($item as $row){
                                ?>
                                <tr>
                                    <td><?=$row["item_name"]?></td>
                                    <td class="text-left">Rs. <?=$row["price"]?>.00</td>
                                    <td><?=$row["qty"]?></td>
                                    <td><?=$row["serial_number"]?></td>
                                    <td><?=$row["product_key"]?></td>
                                </tr>
                                <?php
                            }
                            ?>

                            </tbody>
                            <tfoot>
                            <tr>
                                <th>Item Name</th>
                                <th>Price</th>
                                <th>Quantity</th>
                                <th>Serial Number</th>
                                <th>Product Key</th>
                            </tr>
                            </tfoot>
                        </table>
                    </div>
                    <div>
                        <P>Total Spends is <?=$row->price?></P>
                    </div>
                    <!-- /.box-body -->
                </div>
                <!-- /.box -->
            </div>
            <!-- /.col -->
        </div>
        <!-- /.row -->
    </section>
    <!-- /.content -->
</div>
<!-- /.content-wrapper -->