To check the totals of the boxes in the primary grid, open the Totals window by pressing the Show totals button, or by selecting the menu item View->Totals.

The Totals window can be left open so that you can always have access to a summary of the boxes you are working with. It is a "stay on top" window, which means it cannot be buried behind other windows.

If you want to know the breakdown of the totals by product, open the Product Summary window. Either click the Show Summary button, or select the menu item View->Summary.

This window is also a "stay on top" window, and it is also resizable so you can place it somewhere on the screen where it won’t obstruct the view.