Marketpress global cart feature request

Hi,

I wanted to suggest a feature for Marketpress global cart. There should be an option to show items and costing separated per store bases also.
So if there are like 3 stores and from each 3 items are placed in the cart, the cart should have an option to list them separately based on stores. This will be fairly useful feature if there are 10 ~ 15 items in cart and each shop is like a different category ( food items, cosmetics, electronics etc etc )