function updater(transport, json) {
  var product_list = json['products_list'];
  for (i = 0; i < product_list.length; i++) {
    var units = product_list[i]['units'];
    var product = product_list[i]['product'];
    var color = product_list[i]['color'];
    var subtotal = product_list[i]['subtotal'];

    var id = '-' + product + '-' + color;
    var units_id = 'units' + id;
    var subtotal_id = 'subtotal' + id;
    $(subtotal_id).innerHTML = subtotal.toFixed(2);
    $(units_id).value = units;
  }
  $('total-units').innerHTML = json['units'];
  $('importe').innerHTML = json['importe'].toFixed(2);
}