Final answer:
To record the depreciation expense of the building in 2018, a general journal entry needs to be prepared. The depreciation expense can be calculated using the straight-line method. The entry would involve debiting Depreciation Expense - Building and crediting Accumulated Depreciation - Building.
Step-by-step explanation:
To record the depreciation expense on the building in 2018, we need to prepare the general journal entry. Since the company decided to switch from the double-declining-balance method to the straight-line method in 2018, we need to calculate the depreciation expense for the remaining useful life of the building. The formula for straight-line depreciation is (Cost - Salvage Value) / Useful Life.
In this case, the remaining useful life is 40 years - 2018 = 22 years. So, the depreciation expense for 2018 would be ($800,000 - $50,000) / 22 years = $34,091.
The general journal entry to record the depreciation expense on the building in 2018 would be:
Debit: Depreciation Expense - Building $34,091
Credit: Accumulated Depreciation - Building $34,091