Add new column to shopping cart to pull shipping weight value

Hello, I want to add a new column to the shopping cart; by default there is Image, Item, Qty and Price but I want to add Weight between Item and Qty also I would like to put total weight to the left of subtotal. I think top thing is I need to know where the code is that controls the carts output and what the call would be to pull the shipping weight value; but any pointers are welcome. I am using FrameMarket/GrindMarket.