Answer:
depreciation expense 2017 = $180,000
depreciation expense 2018 = $144,000
depreciation expense 2019 = $115,200
Explanation:
purchase cost $900,000
estimated useful life 10 years
depreciation expense using double declining method = 2 x regular straight method depreciation rate x purchase cost
depreciation expense 2017 = 2 x 1/10 x $900,000 = $180,000
depreciation expense 2018 = 2 x 1/10 x $720,000 = $144,000
depreciation expense 2019 = 2 x 1/10 x $576,000 = $115,200