Text Analytics - PDF - Regex Issue

Hey

I'm new to Regex but working my way through,
I have the correct syntax i need to find certain words when testing with a text file, but when i use it on the PDF it will not work,
Must be an issue with Columns or spacing etc.

i was wondering if someone could point me in the right direction of how i could get it to find the Value.
In the attachment bellow, it would be '0.27'

{
    "targetName": " Total Ex GST",
    "documentContentPattern": "(Total Charges Excluding GST:\s*\$(?<value>(\d{1,3}(\,\d{3})*|(\d+))(\.\d{2})?$))",
    "Comment": "",
    "enabled": true
}

Also, could i get this to map to a Property Field that was set to Number (real)