The plant and machinery cost account of a company is shown below. Depreciation is charged at 20% on the straight-line basis, with proportionate depreciation in years of acquisition and disposal. PLANT AND MACHINERY - COST 2015 Jan 1st Balance b/f Apr 1st Cash Sept 1 Cash 2015 $300,000 Jun 30th Transfer disposal $48,000 $18,000 $36,000 Dec 31 Balance c/f $384,000 $366,000 $384,000 Calculate the depreciation charge for the year ending December 31st, 2015