Store Inventory System

Hi, I just started learning how to code since the begining of this year, I want to finish the year with a personal project "Employee management system" this I have succeeded in creating, with several working functionalities. I want to add a store inventory management capabilities. And so far, I have been able to make the application update,create and delete inventory [login to view URL],I need the application to be able to store request for collection of item in inventory and when the request is carried out, quantity of item requested should be subtracted from the total number of item in inventory. And I should be able to query all request made on that particular product. For instance I should be able to check everyone who requested for an item in a specified time period. Code should be well labelled, for readability( it is important I am able to understand your code). If possible redux should be used for state management(but not compulsory)