Answer:
Using the straight-line method, the book value at December 31, 2018 would be $53.760
Step-by-step explanation:
2018 2019 2020 2021 2022
Cost 67200 53.760 40.320 26.880 13.440
Dep-Acu 13.440 13.440 13.440 13.440 13.440
Book Value53.760 40.320 26.880 13.440 0