What would be theTscn, BTran & AType for STO?

Hi Experts,

Below are the Technical Scenario, Business transaction, & Action type for the Sales Order (VA01) for the RBA.

What would be the technical scenario, Business transaction and Action type for the Purchase Order(ME21N) for the RBA?

What would be the technical scenario, Business transaction and Action type for the Purchase Order(ME21N) for the RBA?

Thanks,