I have a collection of raw sales figures stored in CSV files and want to turn them into clear, insightful pie charts that break down performance by sales representative. The scope is focused and straightforward: • Import and clean the CSV data • Aggregate totals per rep and calculate their share of overall sales • Produce polished pie charts (static or interactive) that I can drop straight into presentations • Supply the working file or script so I can refresh the visuals when new CSVs arrive Feel free to use Excel, Tableau, Power BI, Python (matplotlib, Plotly), or any tool you’re comfortable with—as long as the final charts are accurate, visually consistent, and easy for me to update.