我试图从所有表单域中获取结果。当我更改值并更改复选框时，总和的答案应该更改。如何从文本区域、复选框和单选按钮中获取总和的值？
下面是我的JavaScript代码：

$("document").ready(function () {
  $("#orderbutton").on("click", function () {
    var weight = parseFloat($("#weight").val());
    var destination = $("#destination").val();
    var insurance = $("#chkbox1").val();

    //construct output
    var msg = "<div> Result Of your order: </div>";
    msg += "<div> Package weight: " + weight + " pounds </div>";
    if (weight <= 25) {
      msg += "<div> Base cost based on your weight: $15.00  <div>";
    } else if (weight <= 50) {
      msg += "<div> Base cost based on your weight: $25.00 <div>";
    } else {
      msg += "<div> Base cost based on your weight: $40.00 </div>";
    }
    if (destination == "ny") {
      msg += "<div> Destination Selected: New York State( No extra cost)</div>";
    } else {
      msg += "<div> Destination Selected: Out Of State ($15.00 Extra)</div>";
    }
    if ($("#chkbox1").is(":checked")) {
      msg += "<div>Insurance option: Insurance Choosen($10.00 Added)<div>";
    } else {
      msg += "<div> Insurance option: Insurance Not Choosen($0.00 Added)</div>";
    }
    msg += "<div> Total price of order: </div>";

    $("#output").html(msg);
  }); // end event handler
}); // end document.ready

sample result image