Greentree Properties Ltd. is a publicly listed company following IFRS. Assume that on December 31, 2020, the carrying amount of land on the statement of financial position (SFP) is $500,000. Management determines that the land's value in use is $425,000 and that the fair value less costs to sell is $400,000.

a. Using the rational entity impairment model, prepare the journal entry required, if any, to record the impairment loss.

b. Due to an economic rebound in the area, by the end of the following year the land has a value in use of $550,000 and fair value less costs of disposal of $480,000. Prepare the journal entry required, if any, to record the increase in its recoverable amount.