The faceted catalog was designed to have sellers upload a pricing and inventory feed that includes cost, list price, and sell price. If you are unable to do that with your configuration or you would like to modify a small number of selling prices or list prices you can do so via pricing maintenance. Here are the steps:
1. From the pricing menu of your dashboard choose 'pricing maintenance'
2. On the selection screen choose the supplier catalog (use SOP if you are a B2C Central seller), enter the SKU (without spaces. If the catalog has spaces, use - where you would have a space)
3. Click add button. Enter the selling price in the field cstmarkup and the list price in the field listmarkup and hit save
That's it!