On July 1, Arcola Company purchases equipment for $330,000. The equipment has an estimated useful life of 10 years and expected salvage value of $40,000. The company uses straight-line depreciation. Four years later, economic factors cause the fair value of the equipment to decline to $160,000. On this date, Arcola examines the equipment for impairment and estimates $185,000 in undiscounted expected cash inflows from this equipment.

1. 1. Compute the annual depreciation expense relating to this equipment.
2. 2. Compute the equipment's net book value at the end of the fourth year.
3. 3. Apply the test of impairment to this equipment as of the end of the fourth year. Is the equipment impaired? Show supporting computations.
4. 4. If the equipment is impaired at the end of the fourth year, compute the impairment loss.