JQuery: сумма всех полей ввода в счете

//checkboxes and buttons

var basicPrice = 5000; // This is how we start
function getCheck() {
  var currentPrice = basicPrice; // every time
  currentPrice = parseFloat($(".event-hook-class.active").data("prezzo")) || basicPrice, // add any "active" boxes
    services = [],
    total = 0;

  $("input[id^=service]").each(function() {
    if (this.checked) {
      total += +this.value;
      services.push($("[for=" + this.id + "]").html()); // get the label text
    }
  });
  $("#prezzo").text((currentPrice + total).toFixed(2) + "€");
  $("#aaa").text((currentPrice + total).toFixed(2));
  $("#serv").html("services: " + services.join(", "));

  document.getElementById('slider1').max = (currentPrice + total).toFixed(2);
}


$(document).ready(function() {
  $("input[id^=service]").on("click", getCheck);
  $(".event-hook-class").on("click", function(e) {
    e.preventDefault();
    $(".event-hook-class").removeClass("active");
    $(this).addClass("active")
    $("#prezzo").html($(this).data('prezzo') + ' €');
    $("#mq").html($(this).data('mq'));
    getCheck(); // will add this and the checkboxes
  });
  getCheck(); // initialise on page load
});




//slider
$(document).ready(function() {


  var zzz = document.getElementById('aaa').innerText;
  document.getElementById('slider1').max = zzz;
});
const $mutuo = $("#mutuo"),
  $rata = $("#rata"),
  $anni = $("#anni"),
  $slider1 = $("#slider1"),
  $slider2 = $("#slider2"),
  $max = $("#aaa").html();


function showAmount1(newAmount) {
  document.getElementById('mutuo').innerHTML = newAmount;
  $mutuo.val($("#mutuo").innerHTML);
  update();
}


function showAmount2(newAmount) {

  document.getElementById('anni').innerHTML = newAmount;
  $anni.val($("#anni").innerHTML);
  update();
}





function update() {
  let interesseannuo = 1.60,
    C = $mutuo.html(),
    anni = $anni.html(),
    i = interesseannuo / 12 / 100,
    n = anni * 12,
    rata = C * i / (1 - Math.pow(1 + i, -n));

  $rata.html(rata.toFixed(2) + " €");
}
update();

                              C.1_1 
 piano 1
 prezzo 5000 €
                              D.1_1 
 piano 1
 prezzo 10000 €
                              C_2.1 
 piano 2
 prezzo 15000 €






  
design pack 22500 €
  
security 2000 €
  
wellness pack 5000 €
  
box auto 1000 €









  200 €








  

  
Totale mutuo (€)
  

  
0





  
Durata mutuo (anni)
  
  
10





  
La tua rata