Updated prices on register.php, added new options

Updated the product arrays to include 	array( "name" => "Host Chapter Party Only", "price" => "40.00" ),
		array( "name" => "Awards Dinner Only", "price" => "100.00" ),
		array( "name" => "Bro's Arts Ball Only", "price" => "75.00" ),
		array( "name" => "Abele Tour", "price" => "20.00" ) also changed the price on array( "name" => "Volunteer Advance Registration", "price" => "285.00" ),