Problems reading an array and presenting it in the view in Laravel 5.6

Good afternoon I have been working with Laravel 5.6 and I have a problem reading an array that passed from the controller to the view, the array that passes from the controller arrives in the following way:

array:5 [▼
   0 => {#357 ▼
     +"serie": "AB-138"
     +"numero": "2529150"
     +"fecha": "08/11/2016"
     +"codigo": "3810056"
     +"descripcion": "BICILETA DE CARRERA"
     +"costo": 2000
   }
   1 => {#358 ▼
     +"serie": "AB193"
     +"numero": "2632668"
     +"fecha": "02/08/2017"
     +"codigo": "3804056"
     +"descripcion": "OSITO DE PELUCHE"
     +"costo": 50
   }
   2 => {#359 ▼
     +"serie": "AB199"
     +"numero": "263775"
     +"fecha": "02/09/2017"
     +"codigo": "380635"
     +"descripcion": "GUANTES DE GOMA"
     +"costo": 5
   }
 ]

But when trying to go through it and present it to the view with the following code

<tbody id='detallecompra'>
      @php ($total = 0)

      @endphp
      @foreach ($productos as $producto)
         <tr>
           <td>{{ $producto->serie }}</td>
           <td>{{ $producto->numero }}</td>
           <td>{{ $producto->fecha }}</td>
           <td>{{ $producto->codigo}}</td>
           <td>{{ $producto->descripcion }}</td>
           <td>{{ $producto->costo}}</td>

         <tr> 
          @php ($total+=$producto->costo)
          @endphp

      @endforeach
      <tr class="table-info">
            <td colspan="5">Total</td>
            <td class="text-right">{{ $total }}</td>
        </tr>

    </tbody>

Laravel answers me with the following error

Undefined property: stdClass::$serie

Someone could help me how to go through the array very grateful in advance