Economic Order Quantities (EOQ)

I was wondering what other companies are doing to calculate the economic order quantity for Finished goods as well as for Raw and WIP items?  I have not seen any functionality within Oracle that does this.  We use Oracles EBS suite as well as ASCP, Demantra, and IO for calculating the Safety stock on finished good items.  We want just a standard APICs EOQ calculation that would populate the item Fixed Order Quantity or the Fixed Days Supply.

Thanks