During creation of NON stock material PO from where system will pick price

Hello All,

While creating PO for non stock material from where system will pick the price?

If info record is there from where it will pick, if info record is not there then from where it will pick like that...

If existing PO is there or not

if existing contract is there or not

For non stock material should we maintain the material master or ?

Please advise me

Thanks in advance