Brook Company purchased equipment on January 1, 2019 for $102,000. It is estimated that the equipment will have a $6,000 residual value at the end of its 6-year useful life. It is also estimated that the equipment will produce 80,000 units over its 6-year life.

Instructions: Answer the following independent questions.

1. If the company uses the straight-line depreciation method, what are the depreciation expenses for 2019, and the book value of the equipment at the end of 2020?
2. If 6,000 units of product are produced in 2019 and 12,000 units are produced in 2020, and the company uses the units-of-activity depreciation method, what are the depreciation expenses for 2019 and 2020?
3. If the company uses the double-declining-balance method of depreciation, what are the depreciation expenses for 2019 and 2020? (Round to the nearest dollar)
4. On January 1, 2021, the company decided that the equipment has a remaining useful life of 8 years with a residual value of $2,000. The straight-line method of depreciation is used.
   1. Compute the revised annual depreciation expense for 2021.
   2. On April 1, 2022, Brook sold the equipment for $62,000. Determine the gain or loss on disposal of equipment and prepare the journal entry to record this transaction.