Hi,
If you want to automate the price from info record, you have to use the condition table 017 (Material Info Record (Plant-Specific)) or 018 (Material Info Record) in your access sequence. Standard access seq for PB00 is 0002
If you want custom price based other than the inf record price as per your existing access sequence, go to MEK1 transaction and maintain the price for PB00 against the condition type.
Regards,
AKPT