User Exit for Material cost valuation
Any pointers which user exit is used for material cost valuation.
Try transaction SMOD, Enhancement COPCP005. This enhancement contains function module EXIT_SAPLCK21_002 "User Exit for Material Valuation (Strategy U)". Your logic can be added in include program zxckau08. If you are on a 4.6C system, the documentation for this enhancement does not exist. The documentation can be found in <a href="https://websmp105.sap-ag.de/~form/sapnet?_FRAME=CONTAINER&_OBJECT=011000358700008325022001">Note 386803</a>.
Other SMOD enhancements include:
COPCP001 User exit for cross-company code costing, which calls function module EXIT_SAPLCK21_001 "User Exit for Material Valuation in Cross-Company Costing."
COPCP002 User exit: Material valuation of valuated sales order stock which call function module EXIT_SAPLCK36_001 "Valuation of Material in Valuated Sales Order Stock."
M61X0002 User Exits PP-MRP Material Requirements Planning Evaluations which calls function modules EXIT_SAPLM61R_001 and EXIT_SAPMM61R_001.