Как вставить значение в условие из другого ползунка, с конкретным id?

Есть полуготовый калькулятор состоящий из 2-х ползунков и выпадающего списка:

$(document).ready(function() {
  var check = 0;

  $('.id').on('change', function() {
    check = 0;
    $('input:checkbox:checked').each(function() {
      if ($(this).prop("checked")) {
        check = Number(check) + Number($(this).data('check'));
      }
    });
    summ();
  });

  $("#polzunok-1").slider({
    slide: function(event, ui) {
      if (ui.value >= 30 && ui.value < 50) {
        $("#gorod")[0].selectedIndex = 4;
        $("#polzunok-2").slider({
          value: 3
        });
      } else if (ui.value >= 20 && ui.value < 30) {
        $("#gorod")[0].selectedIndex = 3;
        $("#polzunok-2").slider({
          value: 5
        });
      } else if (ui.value = 10 && ui.value < 20) {
        $("#gorod")[0].selectedIndex = 2;
        $("#polzunok-2").slider({
          value: 3
        });
      } else if (ui.value >= 5 && ui.value < 10) {
        $("#gorod")[0].selectedIndex = 1;
        $("#polzunok-2").slider({
          value: 2
        });
      } else if (ui.value >= 3) {
        $("#gorod")[0].selectedIndex = 0;
        $("#polzunok-2").slider({
          value: 1
        });
      }
    }
  });

  $("#polzunok-2").slider({
    slide: function(event, ui) {
      if (ui.value >= 8) {
        $("#gorod")[0].selectedIndex = 4;
        $("#polzunok-1").slider({
          value: 30
        });
      } else if (ui.value >= 5 && ui.value < 8) {
        $("#gorod")[0].selectedIndex = 3;
        $("#polzunok-1").slider({
          value: 20
        });
      } else if (ui.value >= 3 && ui.value < 5) {
        $("#gorod")[0].selectedIndex = 2;
        $("#polzunok-1").slider({
          value: 10
        });
      } else if (ui.value >= 2 && ui.value < 3) {
        $("#gorod")[0].selectedIndex = 1;
        $("#polzunok-1").slider({
          value: 5
        });
      } else if (ui.value >= 1 && ui.value < 2) {
        $("#gorod")[0].selectedIndex = 0;
        $("#polzunok-1").slider({
          value: 3
        });
      }
    }
  });
});


$(function() {

  $("#gorod").change(function(e) {
    if (this.options[1].selected) {
      $("#polzunok-2").slider({
        value: 2
      });
      $("#polzunok-1").slider({
        value: 5
      });
    }
  });

  $("#gorod").change(function(e) {
    if (this.options[0].selected) {
      $("#polzunok-2").slider({
        value: 1
      });
      $("#polzunok-1").slider({
        value: 3
      });
    }
  });

  $("#gorod").change(function(e) {
    if (this.options[2].selected) {
      $("#polzunok-2").slider({
        value: 3
      });
      $("#polzunok-1").slider({
        value: 10
      });
    }
  });

  $("#gorod").change(function(e) {
    if (this.options[3].selected) {
      $("#polzunok-2").slider({
        value: 5
      });
      $("#polzunok-1").slider({
        value: 20
      });
    }
  });

  $("#gorod").change(function(e) {
    if (this.options[4].selected) {
      $("#polzunok-2").slider({
        value: 8
      });
      $("#polzunok-1").slider({
        value: 30
      });
    }
  });

  var tran = 1,
    result_outptut = jQuery("#amount3"),
    client = 1,
    revenue = 0;
  var polzunok1Price = 0;
  var polzunok2Price = 0;
  var typeAllPrice = 0;

  function updatePrice() {
    var price = polzunok1Price + polzunok2Price + typeAllPrice;
    $("#amount3").val("$" + price);
  }

  function recount() {
    revenue = temp + tran;
    result_outptut.html(revenue + ' руб/мес');
  };

  jQuery('.transport').click(function() {
    tran = $('.transport').val();
    recount();
  });

  $("#polzunok-1").slider({
    value: 0,
    min: 3,
    max: 50,
    step: 1,
    slide: function(event, ui) {
      $("#amount1").val(ui.value);
      polzunok1Price = ui.value;
      updatePrice();
      if (ui.value >= 30) {
        $("#gorod")[0].selectedIndex = 4;
      } else if (ui.value >= 20) {
        $("#gorod")[0].selectedIndex = 3;
      } else if (ui.value >= 10) {
        $("#gorod")[0].selectedIndex = 2;
      } else if (ui.value >= 5) {
        $("#gorod")[0].selectedIndex = 1;
      } else if (ui.value >= 3) {
        $("#gorod")[0].selectedIndex = 0;
      }
    }
  });

  $("#polzunok-2").slider({
    value: 0,
    min: 1,
    max: 15,
    step: 1,
    slide: function(event, ui) {
      $("#amount2").val(ui.value);
      polzunok2Price = ui.value;
      updatePrice();
      if (ui.value >= 8) {
        $("#gorod")[0].selectedIndex = 4;
      } else if (ui.value >= 5) {
        $("#gorod")[0].selectedIndex = 3;
      } else if (ui.value >= 3) {
        $("#gorod")[0].selectedIndex = 2;
      } else if (ui.value >= 2) {
        $("#gorod")[0].selectedIndex = 1;
      } else if (ui.value >= 1) {
        $("#gorod")[0].selectedIndex = 0;
      }
    }
  });

  if ($('[type="checkbox"]').is(':checked')) {
    typeAllPrice = parseInt($('[type="checkbox"]:checked').val());
    updatePrice();
  }

  $('[type="checkbox"]').change(function() {
    var typePrice = parseInt(this.value);
    if ($(this).is(':checked')) {
      if (isFinite(typePrice)) {
        typeAllPrice += typePrice;
        updatePrice();
      }
    } else {
      typeAllPrice -= typePrice;
      updatePrice();
    }
  })
});
<html>

<head>
  <title>Калькулятор</title>
  <script src="http://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
  <link rel="stylesheet" href="https://code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
</head>

<body class="no-bg its-api tariff-">
  <div id="page" class="js-content-switcher design preview resize-960 theme-3 theme-3_color-5" style="min-height: 150px;">
    <div class="wrap-calc" style="max-width: 820px;">
      <ul id="viewing_panel" class="blocks fields grid-table no-border 812787" style="max-width: 820px;">
        <li class="ub-grid grid-line" id="grid-3" data-columns="1">
          <div class="ub-grid grid-column" id="grid-3-3">
            <div class="grid-subline">
              <div class="grid-subcolumn" style="width: 100%;">
                <div data-id="3" data-type="selector" data-hide="[hide]" class="ub-grid padding-lr-24 " style="padding-top: 12px; padding-bottom: 18px; display: block;">
                  <div class="field field-select">
                    <div class="field-title size-18" data-change="titleSwitcher-selector-3" data-canedit="true" style="display:block" data-source="group">
                      <p>Тарифы</p>
                    </div>
                    <div class="field-desc" data-change="descSwitcher-selector-3" data-canedit="true" style="display:none" data-source="desc">Небольшое описание</div>
                    <div class="field-body">
                      <div class="field-body__item">
                        <select name="gorod" id="gorod" data-options="500" data-option="0" data-name="Тарифы">
                          <option value="95" data-option="0" name="Промо" id="promo">Промо</option>
                          <option value="194" data-option="1" name="Стартовый" id="starter">Стартовый</option>
                          <option value="387" data-option="2" name="Бизнес" id="biznes">Бизнес</option>
                          <option value="618" data-option="3" name="Корпоративный" id="coop">Корпоративный</option>
                          <option value="3300" data-option="4" name="Колл-центр" id="callcentr">Колл-центр</option>
                        </select>
                      </div>
                    </div>
                    <div class="polzunok-wrap">
                      <div class="field field-slider">
                        <div class="field-title size-18" data-change="titleSwitcher-slider-6" data-canedit="true" style="display:block" data-source="group">
                          <p>SIP линии<br></p>
                        </div>
                        </br>
                        <div id="polzunok-1" class="rangeouter ui-slider ui-corner-all ui-slider-horizontal ui-widget ui-widget-content">
                          <div class="rangeouter"></div>
                          <div class="rangeinner" style="width: 0%;"></div>
                          <span tabindex="0" class="rangeselector ui-slider-handle ui-corner-all ui-state-default" data-ub-title="3" data-ub-pos="top" style="left: 0%;"></span>
                          <div id="polzunok-1" class="">
                            <span class="slider-line__num slider-line__num-min" style="left:4.25531914893617%;">5</span>
                            <span class="slider-line__num" style="left:14.893617021276595%;">10</span>
                            <span class="slider-line__num" style="left:25.53191489361702%;">15</span>
                            <span class="slider-line__num" style="left:36.170212765957444%;">20</span>
                            <span class="slider-line__num" style="left:46.808510638297875%;">25</span>
                            <span class="slider-line__num" style="left:57.44680851063829%;">30</span>
                            <span class="slider-line__num" style="left:68.08510638297872%;">35</span>
                            <span class="slider-line__num" style="left:78.72340425531914%;">40</span>
                            <span class="slider-line__num" style="left:89.36170212765957%;">45</span>
                            <span class="slider-line__num slider-line__num-max" style="left:100%; width: 16px;">50</span>
                          </div>
                        </div>
                      </div>
                      </br>
                      <div class="field field-slider">
                        <div class="field-title size-18" data-change="titleSwitcher-slider-6" data-canedit="true" style="display:block" data-source="group">
                          <p>Обслуживание внешних линий<br></p>
                        </div>
                        </br>
                        <div id="polzunok-2" class="rangeouter ui-slider ui-corner-all ui-slider-horizontal ui-widget ui-widget-content">
                          <div class="rangeouter"></div>
                          <div class="rangeinner" style="width: 0%;"></div>
                          <span tabindex="0" class="rangeselector ui-slider-handle ui-corner-all ui-state-default" data-ub-title="3" data-ub-pos="top" style="left: 0%;"></span>
                          <div class="">
                            <span class="slider-line__num" style="left:0%;">1</span>
                            <span class="slider-line__num" style="left:7.142857142857143%;">2</span>
                            <span class="slider-line__num" style="left:14.285714285714286%;">3</span>
                            <span class="slider-line__num" style="left:21.42857142857143%;">4</span>
                            <span class="slider-line__num" style="left:28.571428571428573%;">5</span>
                            <span class="slider-line__num" style="left:35.714285714285715%;">6</span>
                            <span class="slider-line__num" style="left:42.85714285714286%;">7</span>
                            <span class="slider-line__num" style="left:50%;">8</span>
                            <span class="slider-line__num" style="left:57.142857142857146%;">9</span>
                            <span class="slider-line__num" style="left:64.28571428571429%;">10</span>
                            <span class="slider-line__num" style="left:71.42857142857143%;">11</span>
                            <span class="slider-line__num" style="left:78.57142857142857%;">12</span>
                            <span class="slider-line__num" style="left:85.71428571428572%;">13</span>
                            <span class="slider-line__num" style="left:92.85714285714286%;">14</span>
                            <span class="slider-line__num" style="left:100%; width: 16px;">15</span>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </li>
      </ul>
    </div>
  </div>
</body>

</html>

Список содержит 5 тарифов: 1)ПРОМО; 2)СТАРТОВЫЙ; 3)БИЗНЕС; 4)КОРПОРАТИВНЫЙ; 5)Колл-центр.

Минимальные значения по тарифам для 1-ой шкалы: 1)3; 2)5; 3)10; 4)20; 5)30;

Минимальные значения по тарифам для 2-ой шкалы: 1)1; 2)2; 3)3; 4)5; 5)3;

При смещении ползунка, я использую условия такого плана:

$("#polzunok-2").slider({
                . . .
    else if (ui.value = 10 && ui.value < 20) {
      $("#gorod")[0].selectedIndex = 2;
      $("#polzunok-2").slider({     
        value: 3
      });
    }
                . . .
 });

Но, как вставить второе значение 2 ползунка в условие, для работы подобного условия:

$("#polzunok-2").slider({
  if (ui.value >= 3 && $("#polzunok-1").slider({ui.value >= 30})) {
    $("#gorod")[0].selectedIndex = 4;
    $("#polzunok-1").slider({   
      value: 30
    });
  }
});

Ответы (0 шт):