General Excel Assistance Needed

I have several Excel workbooks that need a mix of clean-up, enhancement, and automation. Some sheets require better formulas to cut down manual entry, others would benefit from pivot-table summaries or a small VBA routine to speed up repetitive tasks. Because the files vary in size and complexity, I’d like you to review them with me first, outline the most efficient approach, then deliver a streamlined, well-documented workbook.

The finished files should be easy for any colleague to follow, with clear cell references, named ranges where it helps readability, and comments in any macro code you introduce. Please include a brief change log so I can track what was modified and why.