Power BI Sales Dashboard

I have a collection of Excel/CSV files that record every sale we make, and I want them transformed into a single, interactive Power BI dashboard. The focus is purely on sales—no employee performance or website analytics for this phase.

What the dashboard must let me see at a glance:
• Total revenue
• Brand-wise performance
• Product-category performance
• Sales-person contribution
• Target vs achievement comparisons
• Monthly, quarterly and yearly trend lines
• A pin-code-level map that shows where revenue is coming from

Please build a clean data model from the spreadsheets, create the visuals, and add intuitive slicers so users can drill by date, brand, product category and region. I’d like the finished .pbix file plus a short set of notes (or brief Loom walk-through) explaining the data preparation steps so I can refresh it myself in the future.