I can only think of these:
-Additional costs of constructing and implementing ethical procedures. These are only costs in the initial stages as after this they should pay for themselves in extra sales. There are many costs associated these can be planning and development of procedures, training of staff, changing suppliers(to ethical ones) etc.
This could be split if you run out of ideas.
-Exclusion of 'good' suppliers because of their unethicalness. Also Repulsion of certain 'traditionalists' eg. managers could resign.
Can't actually think of a real situation for this.
-Higher manufacturing cost of items. meaning you need to either take less profit or charge more. People generally pay more for 'Ethically' made products but even a small increase from competitors pricing could eliminate a significant portion of your market.
Someone else can probably think of better answers, but these are mine
