I have an Excel workbook (~1.29 GB) where roughly 540 PNG images sit one-per-row in column B. Every image must be converted to JPG, compressed so the resulting file is between 200 KB and 300 KB, and then pasted into column C on the same row. The rows are already in the correct order, so nothing may be reordered, added, or deleted. You are free to use any conversion method—batch scripts, Python (Pillow, openpyxl), VBA, ImageMagick, or your favourite GUI tool—so long as the final workbook opens cleanly in Excel with each converted JPG beside its original PNG. Deliverables • Updated Excel file with all 540 JPGs in column C, each between 200-300 KB • No change to row count or row order • PNGs in column B left intact for comparison I do not need brightness, contrast, or colour tweaks—just faithful conversion and size optimisation. When you send the finished workbook I will quick-check random rows to confirm file sizes and placement before marking complete. Let me know your expected turnaround time and any questions.