Answer:
$130,000
Explanation:
The net book value of an asset is the difference between the cost and the accumulated depreciation.
Annual depreciation is the cost less salvage value divided by the useful life of the asset.
Annual depreciation = ($180,000 - $30,000)/6
= $25,000
At the beginning of the 3rd year,
Accumulated depreciation = 2 × $25,000 = $50,000
Book value = $180,000 - $50,000
= $130,000