Numerical Spreadsheet Cleanup & Migration

I have several spreadsheets filled with numerical records that now need disciplined, error-free handling. Your assignment is two-fold: first, clean the existing figures—remove duplicates, spot and correct obvious typos, and bring every column into a consistent, well-formatted state... (Budget: ₹12500 - ₹37500 INR, Jobs: Data Analysis, Data Cleansing, Data Entry, Data Management, Data Processing, Excel, Google Sheets)