Excel Document Improvement and Repair

IMPORTANT: PROJECT FOR SPANISH SPEAKERS ONLY.

I'm in need of an Excel expert who can help me with a few issues I'm facing with my Excel document. The document is crucial for my business and I need to fix some calculation errors, formatting issues and data validation problems. It's also very important that the original formatting of the document is maintained after the repairs.

Key Requirements:
- Fix calculation errors in the document
- Rectify formatting issues
- Address data validation problems
- Add new formulas to the document
- Ensure the original formatting is maintained

Ideal Skills and Experience:
- Extensive experience in Excel
- Proficient with complex calculations and formulas
- Solid understanding of data validation
- Strong attention to detail
- Ability to maintain the original formatting of the document after repairs

If you're confident in your Excel skills and think you can help me with these issues, I'd love to hear from you.