a business purchased a motor vechile for $44000 gst incluinclusive i.e $40000 plus $4000 gst on 1 january 2016 the motor vechile has an estimated residual value of $4400 gst inclusive i.e $4000 plus $400 gst and a useful life of 200000 km .using the units of production method ,calculate the depreciation expense at 30 june 2016 if the motor vechicle travelled 20000 km for the six months ending 30 june 2016