Answer:
Depreciation 2021 = $10,000
Book Value 2021 = $35,000
Step-by-step explanation:
Straight Line method charges a fixed amount of depreciation during the use of an asset.
Depreciation Charge = (Cost - Residual Value) ÷ Estimated Useful Life
Therefore,
Depreciation 2021 = ($45,000 - $5,000) ÷ 4
= $10,000
Book Value = Cost - Accumulated Depreciation to date
Therefore,
Book Value 2021 = $45,000 - $10,000
= $35,000