Clean & Deduplicate Spreadsheet Data

I have a spreadsheet-based data set that needs a careful once-over. Your task is to hunt down every error, remove duplicate rows, and leave me with a clean, reliable file. Whenever two records look like the same item but the details don’t match perfectly, keep only the newest entry and discard the rest. The file is formatted for standard spreadsheet tools, so you may work in Excel, Google Sheets, or an equivalent environment—whatever lets you deliver accuracy and a clear audit trail. What I’ll look for on delivery: • A fully cleaned spreadsheet or database export, free of duplicates and obvious data-entry mistakes. • A brief change log noting how many duplicates you found and the criteria you applied when choosing the newest record. If this sounds straightforward to you and you have an eye for spotting inconsistencies quickly, I’m ready to pass the file over right away.