Webcke Limited acquired an item of machinery with an expected useful life of 4 years.The expected total production output over this period was: year 1,30 000 units; year 2,25 000 units; year 3,15 000 units; year 4,10 000 units.The machinery cost $85 000 and the residual value is $15 000.The amount of depreciation expense recorded in the first year is:
A)$26 250.
B)$31 875.
C)$21 875.
D)$17 500.