Adding dollar amounts in PHP with smarty template system?

Question

I have several dollar amounts that I need to add. This is the code I'm currently using:

{php}$totalaffamount = $pendingcommissions + $balance + $withdrawn;
echo $totalaffamount;{/php}

Here are the values of each:

$pendingcommissions = $5.00 USD
$balance = $1000.00 USD
$withdrawn = $393.99 USD

I want to display the total like this:

$1398.99

However I keep getting 0 as the output which I'm guessing is because of the dollar sign and USD that are in the variables... Does anyone know what I need to change my code to for this to work?

Answer 1

Try to use values only for this, using $ signs is not the correct way for adding things up

$pendingcommissions = 5.00;
$balance = 1000.00;
$withdrawn = 393.99;

$total = $pendingcommissions + $balance + $withdrawn;

echo '$'.$total;

:)