[thelist] replacing periods with commas

[ftarzwell at fayec.com]

I have an output file that should display:
864,7 $    +8.2
Instead it's showing:
86,.7 $    +,.2 

The code that does the replacement of the period for a comma is as follows:
$change = substr_replace($change, ",", strlen($change) - 3, 1);

Should the code be:
$change = substr_replace($change, ",", strlen($change) - 2, 1);

in order to fix the comma issue?

Thanks in advance for the help,

FayeC