Final answer:
The revised depreciation expense for 2014, after extending the useful life of the equipment to 5 years, is $10,000. This is calculated by subtracting the first year's depreciation from the original cost, leaving a remaining book value of $40,000, which is then depreciated over the new remaining life of 4 years.
Step-by-step explanation:
Initially, Joe's Copy Shop calculated depreciation based on a useful life of 3 years for equipment that cost $60,000. With no salvage value and using the straight-line method of depreciation, the annual expense would have been $20,000 ($60,000 / 3 years).
However, on January 1, 2014, the business decided to extend the useful life of the equipment to a total of 5 years. To calculate the revised depreciation expense for 2014, we need to adjust for the one year of depreciation already taken.
The remaining book value at the start of 2014 is $40,000 ($60,000 - $20,000). This amount will now be depreciated over the remaining 4 years, resulting in a revised annual depreciation expense of $10,000 ($40,000 / 4 years) for 2014 onwards until the end of the new estimated useful life.