Все я разобрался.Подумал и вот что получил
<html>
<head>
<meta charset="utf-8">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
</head>
<body>
<div id="elevator">
<label><input type="radio" class="a1" value="1" name="itemtype1" checked /> 200</label>
<label><input type="radio" class="a1" value="2" name="itemtype1" /> 250</label>
<label><input type="radio" class="a1" value="3" name="itemtype1" /> 300</label>
<label><input type="radio" class="a1" value="4" name="itemtype1" /> 350</label>
<br/>
<input type="number" id="count2" value="0" min="0" />
<input type="number" id="count3" value="0" min="1" />
</div>
<span id="final_price_yslug">0</span>
<script>
$('#elevator').on('change input', 'input', function(e) {
var price = $(e.delegateTarget).find('input:radio:checked').val() * $('#count2').val() ;
$('#final_price_yslug').text((price+ ($('#count3').val()*10)).toLocaleString('ru-RU', { style: 'currency', currency: 'RUB' }))
});
</script>
</body>
</html>