I have large volumes of an item for sale.

I wish to add a bul price list with a comment to contact me so I can relist the item with the volume of items required by customer.

Am I allowed to put a bulk price list in my listing and specify that a certain amount has been added to the cost to cover selling fees?

ie Can I specify a total price and include and specify in the list the net price of item, plus GST amount + amount added for ebay fees?