formatting output when using ECHO

Can someone help me with a simple(?) problem please?
The problem is that I calculate 600.00 + 250.00 and when I display the result, I see 450
I want to see 450.00
How can I format the value of a variable when using ECHO? Here is a more specific example:


I am connecting to a mysql table and selecting a recordset based on dates entered by the user. I then store the data in arrays and close the connection. At this point I perform various calculations based on user preferences.

I perform simple calculations like this:

for ($k = 0; $k<=$count0; $k++)
{
$TotalNet = $TotalNet +$arNet[$k];
$TotalComm = $TotalComm +$arCommision[$k];
$TotalVAT = $TotalVAT +$arVAT[$k];
}

Then I try to display the results like this:


<table width="477" border="1">
<tr bgcolor="#99FFFF">
<td width="324"><div align="right">Totals:</div></td>
<td width="39"><?php echo ("$TotalNet")?></td>
<td width="53"><?php echo ("$TotalComm")?></td>
<td width="33"><?php echo ("$TotalVAT")?></td>
</tr>
</table>

etc. etc.
What am I doing wrong? The actual values picked up from the mysql table are 400.00 and 250.00
Thanks!

Two ways you can do this...use printf:

printf ("%.2f",$TotalNet);

or number_format:

echo number_format($TotalNet, 2);

geee. there is am easy way to do that... :S

Thanks for the help! I tried Matt's solution and it is working perfectly. I will try the :S suggestion as well.