Check out our four new lessons in the Data Science Learning Path that will help you stay entertained and learn some new skills while you're stuck at home!Data Science Learning Path
The final state or proposed solution is not what is requested for by the instructions.
Dropping fields and concatenating information is not helpful for a review. The helpful piece of Category and sub-category have been lost in your solution.
One possible answer comes immediately after adding the review comment to each row, but that still requires additional actions to conduct a proper review.
A better answer is to provide all the details of the related transactions and all the details for a proper review.
We can now see that is is the home office, who probably does the fewest transactions who needs more training to add additional details when processing a transaction.
Attached is a better solution.