Pushing BOM Costs To New Item Standard Costs?

After I add new raw material items and also their costs, I added new manufactured items. I then imported my BOMs from my old system. I was hoping that the importing of the BOMs would update manufactured items standard costs, but item shows no cost.

  If I manufacture the item, standard costs are updated. Is there a way to push the calculated costs from the BOMs to the manufactured item without manufacturing the item? I am thinking about the initial stock entry into the system having no costs when I sell the item (until I manufacture replacement inventory).

  Thanks