SportsWorld uses straight-line depreciation for a piece of equipment that cost $12,000, had a trade-in value of $2,000, and a five-year service life. At the end of the third year, the trade-in value was revised to $1,200 and the useful life increased to a total of 6 years. Calculate the amount of depreciation expense for each of the remaining years of the asset's useful life.

$1,000.

$1,467.

$2,160.

$1,800.

$1,600.