How to display total and subtotal Laravel

How can I display subtotal and total to the view?

Here are the code

OrderProduct.php

 protected $fillable = ['Subtotal','total'];

 public function product()
 {
    return $this->belongsTo('App\Product');
 }

Order.php

 public function orderItems()
 {
    return $this->hasMany('App\OrderProduct');
 }

Controller

 $orders = Order::whereHas('orderItems.product', function ($query) 
 {
 $query->where('user_id', '=', $User->id);
  })->get();

Blade

 @foreach ($order->orderItems as $item)
 @if($item->product->user_id == $userID)

  <td></td>  <- display product name 
  <td></td>  <- display product price 
  <td></td> <- display nothing 
  <td></td> <- display nothing

Any help would be appreciated.

via Chebli Mohamed