JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<h1>Lite versie</h1>
<h2 id="investering">De investering is &euro;995,-</h2>
<h2 id="mijnfinforce"> </h2>
<br />

<h2>Koppeling met administratie</h2>
<input value="0" type="radio" name="radio" class="option">Geen</input><br>
<input value="500" type="radio" name="radio" class="option">Exact</input><br>
<input value="500" type="radio" name="radio" class="option">Exact Online</input><br>
<input value="500" type="radio" name="radio" class="option">AccountView</input><br>
<input value="500" type="radio" name="radio" class="option">AFAS</input><br>
<input value="500" type="radio" name="radio" class="option">King</input><br>
<input value="500" type="radio" name="radio" class="option">Snelstart</input><br>
<input value="500" type="radio" name="radio" class="option">Multivers</input><br>
<input value="500" type="radio" name="radio" class="option">Multivers extended</input><br>
<input value="500" type="radio" name="radio" class="option">Twinfield</input><br>
<input value="500" type="radio" name="radio" class="option">Microsoft Navision</input><br>
<input value="500" type="radio" name="radio" class="option">Anders</input><br>
<br />

<h2>Hoeveel bedrijven in uw organisatie</h2>
<input value="0" type="radio" name="radio2" class="option">1</input><br />
<input value="2015" type="radio" name="radio2" class="option">2</input><br />
<input value="4030" type="radio" name="radio2" class="option">Meer dan 2</input><br />		


<h2>Hoeveel gelijktijdige gebruikers</h2>
<input value="0" type="radio" name="radio3" class="option">1</input><br />
<input value="0" type="radio" name="radio3" class="option">2</input><br />
<input value="175" type="radio" name="radio3" class="option">3</input><br />	
<input value="350" type="radio" name="radio3" class="option">4</input><br />
<input value="525" type="radio" name="radio3" class="option">5</input><br />

<h1>Modules</h1>
<h2>Kostenplaatsen</h2>
<input...

JavaScript

$(document).ready(function(){
	$('input').click(function(){
		var investering = 995;
		
		$('.option:checked').each(function(){
			investering += parseInt($(this).val());
		});
		
		var mijnfinforce = (((investering * 2) / 60) + 25).toFixed(0);

		$('#investering').html('De investering is &euro;' + investering + ',-');

		$('#mijnfinforce').html('U kunt ook maandelijks &euro;' + mijnfinforce + ',- betalen')
	
	});
});