Metlock, Inc. purchased equipment on January 1, 2021 for $108,000. It is estimated that the equipment will have a $6,000 salvage value at the end of its 5-year useful life. It is also estimated that the equipment will produce 120,000 units over its 5-year life. Answer the following independent questions. Compute the amount of depreciation expense for the year ended December 31, 2021 using the straight-line method of depreciation. Straight-line method $ 20,400 per year If 16,000 units of product are produced in 2021 and 24,000 units are produced in 2022, what is the book value of the equipment at December 31, 2022? The company uses the units-of-activity depreciation method. Book value at December 31, 2022 $ 74,000 If the company uses the double-declining-balance method of depreciation, what is the balance of the Accumulated Depreciation -Equipment account at December 31, 2023? Accumulated Depreciation-Equipment 84,672