ABC Company has been depreciating equipment on a straight line basis taking full year's depreciation from the year of acquisition. The company purchased the equipment for $180,000 on January 1st, 20X1. The original useful life was 10 years with a residual value of $30,000. At the beginning of year 2005, the company adjusted the total useful life to 6 years. The residual value was adjusted to $10,000. The company uses the calendar year for its business year. Is the change retrospective or prospective? Choose.. What would be the depreciation expense in 20X5? Choose