Hi,
This depends upon teh type of the procurement you want to go for with the PO . Say if you want to create the PO for 10 computers and this price includes every thing with your installation too even though you di not mention as condition in the PO ,
Or you can use the PO invoicing methds .
The two types have the following features:
Partial invoicing plans
Here the total value of the item to be invoiced is split up over the individual dates set out in the invoicing plan.
Periodic invoicing plans
Here the total value is invoiced on each due date.
This requires confif settings under MM-Purchasing -po-Invoicing Plans
Hope this is sufficient . Please get back for more information .
Regards,