Hi,
I am not sure but I am placing bid on this project once again, already have provided you details. As I already asked, please provide the tables SQL so that I can set it up on my LAMP server and get ot done. The suggestion I gave last time was that the API should be in PHP and you should share your phpMyAdmin access, seems like you don't have one but that is not a problem at all.
Do let me know when you are available for further discussion, it is absolutely necessary.
My bid is just an initial estimate and can increase or decrease after having detailed discussion.
Looking forward to your positive response.