<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
    <title>Product Selection</title>
  </head>
  <body>
    <form>
      <label for="laptopSelect">Laptop:</label>
      <select class="productSelect" id="laptopSelect" data-price="1500">
        <option value="0">Seçiniz</option>
        <option value="1" data-price="1500">1 Adet</option>
        <option value="2" data-price="1600">2 Adet</option>
        <option value="3" data-price="1700">3 Adet</option>
      </select>
      <label for="phoneSelect">Telefon:</label>
      <select class="productSelect" id="phoneSelect" data-price="800">
        <option value="0">Seçiniz</option>
        <option value="1" data-price="800">1 Adet</option>
        <option value="2" data-price="850">2 Adet</option>
        <option value="3" data-price="900">3 Adet</option>
      </select>
      <input type="text" id="totalPrice" name="totalPrice" readonly />
    </form>
    <script>
      $(document).ready(function () {
        updateTotalPrice();
        $(".productSelect").on("change", function () {
          updateTotalPrice();
        });
      });
      function updateTotalPrice() {
        var totalPrice = 0;
        // Her bir seçeneği dolaş
        $(".productSelect").each(function () {
          var selectedValue = $(this).val();
          var price = parseFloat($(this).find(":selected").data("price")) || 0;
          if (selectedValue !== "0") {
            totalPrice += price;
          }
        });
        // Toplam fiyatı ekrana yazdır
        $("#totalPrice").val(totalPrice.toFixed(2));
      }
    </script>
  </body>
</html>