need total amount displayed of data-price attribute from each table

I'm not 100% on Javascript and got bit stuck on a feature I am trying to do. I want to display the total amount of data-price attribute. The code I currently have is below, sorry it's quote long code. The code currently works so when I click add to list, it adds the service name and cost to a table below and the same for the part name and cost table which is all good. I just need to somehow get the total amount from each table row of both service and part table and display the amount below...

need total amount displayed of data-price attribute from each table WordPress ...