Executed PDF table extraction using pdfplumber.
Rows extracted: 6
Source pages: 1
Printed subtotal: USD 1,250.00
Calculated subtotal after LibreOffice recalculation: USD 1,250.00
Difference: USD 0.00
Uncertain cells: none detected in this text-based fixture.
Independent CSV answer-key comparison: all six rows exactly match.
Leading-zero IDs preserved: 001 through 006.
This is one Codex-session exercise on synthetic data, not an independent benchmark or a guarantee for scanned PDFs.