We have 2 sides of the marketplace : Dropshipping and Wholesale. Retailers can toggle between the 2 sides depending on what they are looking for. The pricing that is displayed on each marketplace is different.
In Wholesale, the retailers will see only the wholesale price that you have listed in your Item Manager. This is the per unit cost for purchasing your products upfront, in bulk. There is no commission or service fee related to this price.
In Dropshipping, the retailers will see the "Item Cost" as 60% of the MSRP you have listed. This is what they will pay you when a dropshipping item is sold. Retailers are allowed to control their own margins when adding items to their site. Regardless of what they sell the product for, the Supplier is always paid the Item Cost (60% of the MSRP you have listed).