When you check costing result with T-code: CK11N or CK13N, in the itemization view, with layout 1SAP05 (Cost Components / Cost Elements(Grouped)), you can see there is a group of lines with "Not Assigned" text:
Financial Accounting (FI)
SAP R/3 Enterprise 4.7
SAP ERP Central Component
SAP enhancement package for SAP ERP
SAP enhancement package for SAP ERP, version for SAP HANA
Lower-level sub-components cost component components ccs , KBA , CO-PC-PCP-WQS , Product Costing with Quantity Structure , Problem
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