Machine B:The recorded cost of this machine was $180,000. Swifty estimates that the useful life of the machine is 4 years with a $10,200 salvage value remaining at the end of that time period.

Calculate the amount of depreciation expense that Swifty should record for Machine B each year of its useful life under the following assumptions. **(Round depreciation cost per unit to 2 decimal places, e.g. 12.25. Round final answers to 0 decimal places, e.g. 2,125.)**

(1)Swifty uses the straight-line method of depreciation.(2)Swifty uses the declining-balance method. The rate used is twice the straight-line rate.(3)Swifty uses the units-of-activity method and estimates that the useful life of the machine is 141,500 units. Actual usage is as follows: 2020, 50,000 units; 2021, 40,150 units; 2022, 30,300 units; 2023, 21,050 units.

**Depreciation Expense**

**2020**

**2021**

**2022**

**2023**

Straight-line method

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Declining-balance method

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Units-of-activity method

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