CSV Data Formatter — Clean & Transform

Clean and transform this data.

## Input Data
```
[Paste your messy CSV, table, or structured data here]
```

## What I Need
- **Output format**: [clean CSV / JSON / markdown table / SQL INSERT / Excel formula]
- **Transformations needed**: [select all that apply]
  - [ ] Remove duplicates
  - [ ] Standardize date formats (to YYYY-MM-DD)
  - [ ] Standardize phone numbers
  - [ ] Standardize names (proper case)
  - [ ] Fill missing values (with [strategy: average / previous / "N/A" / remove row])
  - [ ] Split combined columns (e.g., "City, State" → two columns)
  - [ ] Merge columns (e.g., "First" + "Last" → "Full Name")
  - [ ] Convert currencies
  - [ ] Remove special characters
  - [ ] Trim whitespace
  - [ ] Add a calculated column: [describe formula]
  - [ ] Filter rows where: [condition]
  - [ ] Sort by: [column, ascending/descending]
  - [ ] Group and aggregate: [group by column, calculate sum/avg/count]

## Additional Instructions
- [Any specific rules or edge cases]
- [Column names to rename]
- [Encoding notes]

## Output
1. The cleaned data in requested format
2. Summary of changes made
3. Any data quality issues found (e.g., "5 rows had missing email addresses")