How can we use internal requisition for expense items

Hi,

We are on Oracle eBiz 12.1.3 we are using iProcurement for raising purchase requisition and PO createtion.

We want to use iProcurement to mange, track the usage of internal expense item along with approval process.

User will raise internal requisition to source from the inventory. We dont want any internal sales order. Also dont maintain any physical inventory, so dont want any inventory item. All the items are of expense type.

If it is possible , please share the process doc or setup steps.

Best regards,

Pratik