Yuan Inc purchased a new machine on January 1, 2011.

Relevant information is as follows:

Cost when acquired	$26,000
Estimated residual value	2,000
Estimated useful life	10 years

It is now the beginning of year 6 and the management reevaluated the estimates related to the machine. Compute the depreciation expense for year 6 with the information that the estimated total useful life is changed to 15 years; residual value is unchanged. (Fill in number only)