Pass variable ajax to php and how to make the call in php

Hello I have the following problem I have a dynamic select that gives the user an option and depending on that option throws other options are 2 select this is the code

  <div class="container">
      <div class="row">
        <div class="col-md-4">
            <p>Cantidad de coolers
            <select id="cantidad" name="cantidad" class="form-control">
            </select>
          </p>
        </div>
        <div class="col-md-4">
          <p>Coolers
          <select id="coolers" name="coolers" class="form-control">
          </select>
        </p>
        </div>
        <div class="col-md-4">
          <p><br><button id="enviar" type="submit" class="btn btn-default btn-block">Enviar</button></p>
        </div>
      </div>
      <div class="row">
        <div class="col-md-4">
          <p><b>El resultado es: </b></p><p id="seleccion"></p>

        </div>
      </div>
    </div>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js">
    </script>
    <script type="text/javascript" src="js/index.js"></script>

This selection works with an AJAX code that stores the selected values and then returns them to the html this is the ajax code

  $(document).ready(function(){

  $.ajax({
      type: 'POST',
      url: 'cargar_listas.php'
    })

    .done(function(listas_rep){
      $('#cantidad').html(listas_rep)
    })

    .fail(function(){

      alert('Hubo un errror al cargar las listas_rep')
    })


    $('#cantidad').on('change', function(){

      var id = $('#cantidad').val()

   $.ajax({
        type: 'POST',
        url: 'cargar_coolers.php',
        data: {'id': id}
      })

      .done(function(listas_rep){

        $('#coolers').html(listas_rep)
      })

      .fail(function(){

        alert('Hubo un errror al cargar los vídeos')
      })
    })

    $('#enviar').on('click', function(){

      var resultado = 'Cantidad: ' + $('#cantidad option:selected ').text() +
      ' Coolers elegido: ' + $('#coolers option:selected').text()

      $('#resultado1').html(resultado);

      $.post("envio.php", {"resultado":resultado});
    });

  });

Now the Select and the ajax work perfectly since the end is printed on the screen the selected values

Now my problem is the following I want to take the Values that are printed on the screen by means of AJAX in an ID and pass them to a php variable to store or use that value in another side

in this case the variable that stores the values is called (result)

  var resultado = 'Cantidad: ' + $('#cantidad option:selected ').text() +
      ' Coolers elegido: ' + $('#coolers option:selected').text()

and the ID where the variable is stored is called # result1

Now I use this code in ajax to send the variable to php

  $.post("envio.php", {"resultado":resultado});

and in the url envio.php I call the variable in this way

  <?php

    echo $_GET['resultado'];

  ?>

Now my question is how I can do to pass the ajax variable result to php and if I'm having a good time as I call it in envio.php

Thank you I hope to see it was clear