**What Paul does right in the closing of the letter:**
1. **Expression of Enthusiasm:** He shows enthusiasm for the job and the company, which is important. For example, "I am very excited about the opportunity to work at your company and believe I would be a great fit."

**What Paul does wrong in the closing of the letter:**
1. **Lack of Call to Action:** Paul does not include a strong call to action. He should invite the employer to contact him for an interview. For example, he could say, "I look forward to the opportunity to discuss how my skills and experiences align with your needs. Please feel free to contact me at your earliest convenience."
2. **Overly Informal Language:** He uses informal language that may not be appropriate for a professional setting. For example, "Thanks a bunch for considering me" could be replaced with "Thank you for considering my application."

Including a clear call to action and maintaining a professional tone would strengthen the closing of the letter.