To be honest, I am really not sure. As a professional, I really do not get to see the customer side of things.
What you can do is simply add on the difference as a bonus once you provide a positive rating. Once you rate my answer positively, you will be given the opportunity to do so. You are not obligated to do so, but I would really appreciate it, given the amount of work this required.
Anyway, you can download the completed assignment here:
Inside the zip file you will find all four of the require SQL files.
The create tables are a little bit different than your ERD in some places. This is simply because your ERD is not perfect. There were a few instances of transitive dependences which are not permitted in a relatnional database.
In any case, it all works.
Let me know if you have any additional questions. I'm here to help.
If you require database or web development assistance in the future, please feel free to request me directly by starting your questions with **For TheDoctor**.
Please remember to rate my answer. Thank you so much!