Create a summarized table from the fashion returns dataset by size.

Group the data by size and compute:
- Total orders
- Average return rate
- Average refund amount
- Average restocking cost per unit
- Average negative-profit ratio

Output the result as a well-formatted Excel (XLSX) file with:
- A professional, business-ready table style
- Appropriate use of color to highlight risk and differences
- One or more supporting charts that help interpret the table

The goal is to quickly communicate return-related risk by size
in a clear and visually polished way.