The Peridot Company purchased machinery on January 2, 2011, for $800,000. A five-year life was estimated and no residual value was anticipated. Peridot decided to use the straight-line depreciation method and recorded $160,000 in depreciation in 2011 and 2012. Early in 2013, the company revised the total estimated life of the machinery to eight years.

Required:

1. What type of change is this?

2. Briefly describe the accounting treatment for this change.

3. Determine depreciation for 2013.