Accurate Product Sales Data Input

I have an existing Excel spreadsheet that tracks my product sales. The only column still missing is the Quantity Sold figure for each transaction, and I need every row completed quickly and with zero errors... (Budget: ₹12500 - ₹37500 INR, Jobs: Data Analysis, Data Entry, Data Management, Data Processing, Data Scraping, Excel, Excel Macros, Google Sheets, Social Sales, Spreadsheets)