Further to that - to use commodity groups for coding:
1. Define which financial codes will be needed to code items (you'll probably need input from Finance here).
2. Set up at least one Commodity Group for each financial account code. This can be done in the Item Master.
3. Once Step 2 is completed, go into the Chart of Accounts / Resource Codes and enter the mappings from Commodity Group to financial account code.
4. Go back to the Item Master and specify the Commodity Group on each item.
5. Add your items to inventory if desired.
Note:. The order of these steps is important. If you have done Steps 1-4 BEFORE Step 5, then when you do Step 5, the account code will be automatically copied to the GLACCOUNT field in INVCOST table for that item. From there, it will be used when you issue the item.
If you've already done Step 5 before you perform steps 1-4, then you will need to do a one-time update of the INVCOST table before it will work.