Sheridan Limited purchased a computer for $ 7,000 on January 1, 2020. Straight-line depreciation is used for the computer, based on a five-year life and a $ 700 residual value. In 2022, the estimates are revised. Sheridan now expects the computer will be used until December 31, 2023, when it can be sold for $550. Calculate the 2022 depreciation expense. Depreciation expense $