Customer Data Analysis in Excel

I have a dataset that captures our customers’ demographics, purchase history, and engagement metrics. I need a clear, Excel-based analysis that uncovers actionable patterns: who buys what, when they buy, and any loyalty or churn signals hiding in the numbers.

Here is what I’d like delivered:
• A cleaned and well-structured workbook with formulas, pivot tables, and charts that highlight key customer segments.
• A short executive-style summary sheet of the main insights and recommended next steps.
• Any assumptions or data issues flagged directly in the file so nothing is missed.

Please keep everything inside Excel—no external scripts—so my internal team can update the model later. When you apply, focus on your relevant experience tackling similar customer-centric projects in Excel; links or brief descriptions of comparable work are perfect.