Mine

<html>
<head>
<script type="text/javascript">
function moveNumbers()
{
var vhosts=document.getElementById("vhosts")
var vhostvalue=parseFloat(vhosts.options[vhosts.selectedIndex].text)

var dedicatedip=document.getElementById("dedicatedips")
var dedicatedipvalue=parseFloat(dedicatedip.options[dedicatedip.selectedIndex].text)

var txt=document.getElementById("total").value
var baseprice=20
txt=baseprice + vhostvalue + dedicatedipvalue
document.getElementById("total").innerHTML=txt
}
</script>
</head>

<body>
<form>
Select Number of VHosts:<br />
<select id="vhosts" onChange="javascript:moveNumbers()">
	<option value="0">No VHost</option>
	<option value="1">1 Vhost</option>
	<option value="2">2 Vhosts</option>
	<option value="3">3 Vhosts</option>
	<option value="4">4 Vhosts</option>
	<option value="5">5 Vhosts</option>
	<option value="6">6 Vhosts</option>
	<option value="7">7 Vhosts</option>
	<option value="8">8 Vhosts</option>
	<option value="9">9 Vhosts</option>
</select>
<br />
<br />
Select IPs:<br />
<select id="dedicatedips" onChange="javascript:moveNumbers()">
	<option value="0">No Dedicated IPs</option>
	<option value="1">1 Dedicated IPs</option>
	<option value="2">2 Dedicated IPs</option>
</select>
<br />
<br />
$<span id="total">20</span>
</form>
</body>