How to say “One objection to keeping the library open later is the extra staffing cost.” in Japanese
In Japanese
図書館の開館時間を夜まで延ばすことへの反対意見として、人件費の増加が挙げられます。
Toshokan no kaikan jikan o yoru made nobasu koto e no hantai iken to shite, jinkenhi no zōka ga ageraremasu.