Help with priicng routines and access sequence

Hi. Im actually new to abap and i have to do a routine for shipment route in VOFM. I was actually able to create a new one and when i go to SPRO, i can already see the routine i created under requirements column.

Now, i don't know what codes to put in the routine i created. What the SD functional guy told me is that the routine should be able to pick up values from vbap-route field in SAP table so that when he goes to va03 and views the condition records that he setup, the value from sap table will appear.

I hope i was able to get my point accross. I really don't know how to explain this better.

I would really appreciate it if someone could help me.

Thanks,

Janine