Iprocurement configuration for unusuall business scenarios.

I need to know if this is possible to accomplish in iprocurement.

Current scenario

A user created a requisition for a car battery. The price is $100 which includes core charge of $20.00.

The way it works right now is that $20.00 will be credited on the invoice against that line when the core is return to the vendor..

This is very common scenario in automotive industry for major parts like engines, batteries.

Future

I want to know if it possible to automatically add another line when a user creates a requisition for items that have core charges.

So based on my example , there would be 2 lines. One for $80.00 and the other one for 20 dollars.