Wong purchased a computer for $15,000, (GST exclusive). originally it had an estimated useful life of 4 years and a residual value $3,000. The straight line method of depreciation is used. At the start of the third year of usage Wong revised the life of the computer to a total life of 6 years. The residual value had not changed.

The new depreciation charge that should be recorded for the computer for year 3 is $_________.