As per discussion with Drew:
change the inventory WT/Cost fields to be one field, slash seperated, to appear as: 1 (2) / 1 (2)
that is: item weight (combined weight) / Item cost (total cost).
Display to remove any unnecessary ".0" suffixes as well.
This will enable the field sizes to be adjusted, to allow checkboxes to use the full width as per the description field.
After looking closely, I don't think any space will be really saved by doing this. I can remove the excess .0's
work completed on this awhile ago.