I'm having trouble understanding the #2 on this problem.

Bailand Company purchased a building for $210,000 that had an estimated residual value of $10,000 and an estimated service life of 10 years. Bailand purchased the building 4 years ago and has used straight-line depreciation. At the beginning of the fifth year (before it records depreciation expense for the year), the followingindependentsituations occur:

1. Bailand estimates that the asset has 8 years' life remaining (for a total of 12 years).

2. Bailand changes to the sum-of-the-years'-digits method.

3. Bailand discovers that the estimated residual value has been ignored in the computation of depreciation expense.

How do we get to $34,286? What am I missing?