faulty array syntax?

[Anon]

i am having some trouble passing variables in a form and i'm not sure if it's the way i wrote the array or the way i'm trying to output the data. it's a simple script (the first one i've tried to write on my own which is prolly why it isn't working!) for a registration page to show the a total at the bottom. if anyone would take a look at the temporary page and give me any pointers, it would be very appreciated.
http://sugarrocket.com/gs_formphp.html
thanks in advance,
lauren k
[e-mail]

[Anon]

Nothing loads when I try that page...

---John Holmes...

[Anon]

hmmm that's odd, seems ok on my end... at any rate i'll just put the basics of it below. i set up the array before anything else in the .html file as such:

<?
if ($Number of Students == $Three)
{ $Tuition[] = "US$990";
$Tuition[]= "AU$1320"; }

elseif ($Number of Students == $Four)
{ $Tuition[] = "US$1320";
$Tuition[] = "AU$1760"; }

elseif ($Number of Students == $Five)
{ $Tuition[] = "US$1550";
$Tuition[] = "AU$2075"; }

elseif ($Number of Students == $Six)
{ $Tuition[] = "US$1860";
$Tuition[] = "AU$2490"; }

elseif ($Number of Students == $Seven)
{ $Tuition[] = "US$2170";
$Tuition[] = "AU$2905"; }

elseif ($Number of Students == $Eight)
{ $Tuition[] = "US$2480";
$Tuition[] = "AU$3320"; }

elseif ($Number of Students == $Nine)
{ $Tuition[] = "US$2790";
$Tuition[] = "AU$3735"; }

else ($Number of Students == $Ten)
{ $Tuition[] = "US$2950";
$Tuition[] = "AU$3950"; }

if($Currency == $US)
{ $Charged = $Tuition[0] }

else($Currency == $AU)
{ $Charged = $Tuition[1] }

print <<HTMLF;

...and then proceeded to put in the rest of the html for the form, where there was a choice between US and AU currency as well as radio buttons to choose how many students were registering. then at the very end i put a text box that i wanted to display $Charged:

<input type="text" name="Charged" size="30">

...finished the html and ended the script:

HTMLF
?>

any ideas?
thanks again to anyone who replies- this project means a lot to this school!

lauren k
[e-mail]

[Anon]

Is your server set up to parse .html files as PHP??

---John Holmes...

[Anon]

i couldn't say for sure, but other snippets of php that i have included in html files have worked fine.
does my the syntax look ok then?