Answer:
4.$3,750
Step-by-step explanation:
The computation of the depreciation expense using the straight line method is shown below:
= (Original cost - residual value) ÷ (useful life)
= ($60,000 - $0) ÷ (4 years)
= ($60,000) ÷ (4 years)
= $15,000
But we have to compute for 3 months i.e September 30, 2018 to December 31 2018
= $15,000 × 3 months ÷ 12 months
= $3,750