Final answer:
The outstanding encumbrances should be reported as Reserved for Encumbrances in the financial statements if they do not relate to a restricted or committed resource.
Step-by-step explanation:
The outstanding encumbrances of $15,000 should be reported as Reserved for Encumbrances in the financial statements if the encumbrances do not relate to a resource classified as restricted or committed. Reserved fund balance represents funds that are legally set aside for a specific purpose but are not classified as restricted or committed. The city plans to honor the purchase orders in fiscal year 2023, so it is appropriate to reserve the fund