Sales Data Seasonal Trend Analysis

I have a complete set of raw sales data that needs to be turned into clear, actionable insight. My single objective is to uncover seasonal trends so I can plan inventory, promotions, and staffing more effectively throughout the year.

You may pull the numbers into Excel, Google Sheets, Python (pandas, matplotlib, seaborn) or R—whatever you are most comfortable with—so long as the result is easy for a non-technical stakeholder to read and reuse. SQL access to the underlying database can be provided if you prefer querying the source directly.

Deliverables I expect:
• A concise visual report (charts or dashboards) highlighting each seasonal swing and its magnitude.
• A brief written summary that explains why the pattern appears and how confident we can be in it (include any statistical tests you run).
• The cleaned, well-commented analysis workbook or script so I can rerun it with future data.

Please let me know up-front which toolset you plan to use and how quickly you can have an initial draft ready.