What is the Accounting Treatment and Configuration for PO without material number? My purchasing team is creating PO without material number using account assignment K and charge the expenses to cost center. But I notice the GR/IR account posted to GR transaction and IR transaction is not the same. I guess is missing configuration. Should I configure the account determination of GR and IR based on Material Group and Valuation Class? And what is the correct accounting treatment for both GR and IR?