Configured Items with cost extras (x costs)

My client utilizes "cost extras" on their configured items.  When the work order is created from the sales order configured item all of the costs, including the cost extras, appear correct in the production cost inquiry (P3102).  However, when the configured item cost is written back to the sales order, the cost does not include the cost extra amounts.

Is there additional set up required to have the cost extra amount to be included in the sales order detail unit and extended cost?

Thanks for your help.