Diiim,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js"></script>
<script>
$(function() {
$("#sli-der-1").slider({
value: 0,
min: 0,
max: 100,
step: 1,
slide: function(event, ui) {
var nnn = 47770 - ui.value * 1500;
if (nnn > 0) { // потом проверяю больше ли 0
nnn = (nnn + "").replace(/(\d)(?=(\d{3})+(?!\d))/g, '$1 ') // если да вывожу
} else {
nnn = 0
}
$("#amount_1_1").text(nnn + " ₽")
}})
});
</script>
</head>
<body>
<span>Количество участников: <input type="text" class="num-bers" disabled="" id="amount_1" value="0"></span>
<!-- ui слайдер -->
<div class="sli-der-calc" id="sli-der-1"></div>
<span class="in-cell" id="amount_1_1">47 770 ₽</span>
</body>
</html>