Answer:
An asset purchased on January 1, 2015 for $60,000 that has an estimated life of 10 years will have a book value on December 31, 2018 of $ 36,000.
Explanation:
Net book value of an asset is equal to cost minus accumlated depreciation of the asset. Accumlated depreciation mean sum of all depreciation charged till date of reporting. So NBV of asset will be calculated as follow
Per year depreciation = 60,000/10 = 6000
NBV = 60,000 - (6000* 4) = $ 36,000