PDF Calculation Corrections Needed

I have a short PDF that already contains simple addition and subtraction, but several of the totals are wrong. I need someone comfortable working directly inside the PDF to modify the existing figures so every calculation checks out—no extra pages or layout changes, just clean, accurate numbers... (Budget: $30 - $250 CAD, Jobs: Adobe Acrobat, Adobe InDesign, Data Entry, Editing, Excel, PDF, Proofreading, Word)