Get and set value of HTML Jquery Table cell with plugin

Hi all CRM friends,

I have two HTML table generated with J Query on the Opportunity entity related with Product. First Table opening through ribbon button and there are editable fields like Discount amount and Net Unit Price. when the fields are edited and click on the save button Plugin will be trigger and read edited value and add to related fields on the another table fields which is also on the opportunity entity. We use Dynamics CRM 2016 v8.2 on premise.

I am not good in C# coding needs your help.

Thanks for the all answer in advance.