The usual CO total tables COSS (int. e.g. activity) and COSP (ext. e.g. material move, FI) contain those amounts, just use OBJNR to find records, and WRTTP to identify type of amounts (look at values of domain CO_WRTTP) planned, actual, overhead, etc. COSL is also useful for Quantities (may be required depending on cost element definition)
Regards,
Raymond
PS: BW is your friend, read Cost Object Controlling: Plan/Actual Data to understand where BW reads those data.