Casi Ltd owns the following three buildings in Hong Kong Office for earning Warehouse Date of acquisition Estimated useful life Cost of the building Fair value of the building at 1 January 2000 20 years HK$20 mm HK$45 m CEO's quarters 1 January 2008 40 years HK$40 m HK$30 m rental income 1 January 2005 30 years HK$20 m HK$25 m 31 December 2015 In the board meeting held on 30 September 2015, the management of Casi Ltd agreed to sell Buildings B and C. A property agent was appointed in October to identify potential buyers. In addition, Casi Ltd moved the storage of its inventories in Building A to a new factory in Vietnam At 31 December 2015, all three buildings were vacant. that its buildings under property, Casi Ltd's accounting policy requires plant and equipment should be accounted for using cost model and they should be assumed with zero residual value. Investment property should be measured using fair value model. Cost to sell the buildings is estimated to be 1% of the disposal value of the asset