Regarding info record and PO _order price unit

Hi Gurus ,

I have created a PIR and maintain condition for different order unit .

Now when i create the PO .. i would like the system to pick the price according to the order unit i enter in the PO .

But it doesnt take that and you have to change that manually ...

is there a way to automate it ??

Condition maintained for BOX and Crate in Info record..

Now during PO

if i enter the Box it should pick up the Box price and not the Crate price?? I hope i am clear on my question ...

Thanks

rahul