Getting data from PDF/PDF opened in a browser of different formats

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I am using paid version of UIPath studio and I need to extract the sub total data from different invoices which gets opened in IE browser as web embeded pdf. I can save those pdfs as well or I can simply extract the data while they are opened in a web browser. All I want to know what would be the best way to extract the subtotal value when pdfs or embedded pdfs in a web browser are in separate format? How to intelligently RPA this query? Any suggestion or help would be highly appreciate.

Thanks

Sample Invoices:
PDF 1:

PDF 2:

PDF 3: