Custom PHP script to return values from aMember database

This is a simple job for anyone familiar with using PHP to return data from a MySQL database. I want to enter an aMember product ID in a piece of php code and have it return that product's inventory quantity when the php renders as html. (See attached image for screenshot of DB). I will use this code on various pages, sometimes for multiple products on a single page. I have amember installed and have the database configuration info. I need php code I can implement myself when needed. I do not prepay, but I will fund a milestone to be released on project completion.