On $1$ January $20$X$1$ Corcoran Bakery Company recognised a brand 'Tubbycakes' as an intangible asset at its acquisition cost of $$50,000$ in accordance with

IAS $38.$ The brand was determined to have a useful life of $10$ years. On $31$ December $20$X$2$ the brand was valued by a brand valuation agency at $$64,000.$

On $31$ December $20$X$3,$ after negative press coverage of Tubbycakes products, the brand's fair value fell to $$25,000.$

Which of the following is recognised in the year ended $31$ December $20$X$3?$