Thank you for your suggestion regarding cost allocation. The option to distribute expenses is now available upon entering a Purchase Invoice with Additional Costs only. The expense is still tied to a particular Service type item created as a product (you cannot simply enter free text) however the process of adding the expense to existing POs is now streamlined. Please take a look at this article for further clarification http://support.dearsystems.com/solution/articles/11000028617-landed-cost-expense-distribution .
If you have any questions or would like to discuss this further please do not hesitate to get in touch with firstname.lastname@example.org