How to align my formatted currency amt to the right

Hi Gurus,
At my list box, I view my 'incomeamt' as custom;
if ($data["purpose"] == "Subscription"){

$value = str_format_currency($data["incomeamt"]);

}

else{

$value = '';

}
The list box is as below:

How do I align all the currency amt to the right?
Thanks in advance.
Kelvin Chua

SINGAPORE