Spirit Company adjusts its accounts at the end of each month. The following information has been assembled in order to prepare the required arijusting entries at December $31,$ Year $11$ Depreciation of office equipment is based on an estimated useful life of six years. The balance in the Office Equipment account is $$9,360$; no change has occurred in the account during the year. By what amount will the book value of the office equipment decline after the appropriate December adjustment is recorded?