Web App – PHP and MySQL based

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I need a web based app created for a company that makes Plastic items.
The currently track stock using Excel. They want a system where they will add in all the stock items they make.
There are about 100+ items that they make and sell to different clients.

1. Must be web based and be based on PHP and MYSQL.
2. User levels – Admin (Access to everything), User (Access to view stock and make New Orders)
3. The system must have these tabs (Stock, Customers, Users, Orders, Reports, Lab)

Please contact for more detail.