Concord Company purchased a computer for $8,400 on January 1, 2019. Straight-line depreciation is used, based on a 5-year life and a $1,050 salvage value. On January 1, 2021, the estimates are revised. Concord now feels the computer will be used until December 31, 2022, when it can be sold for $525. Compute the 2021 depreciation. (Round answer to 0 decimal places, e.g. 45,892.) Depreciation expense, 2021 $______? enter depreciation expense for 2018 in dollars rounded to 0 decimal places