Answer:

yearly depreciation expense using straight-line depreciation = $ 8000

Working notes for the above answer is as under

we have been given that,

A machine costing $54,000

with a 6-year life and

residual value was $6,000

depreciation expense using straight-line depreciation

= Cost -salvage value / life years

= 54000 -6000 /6 years

=8000 year

yearly depreciation expense using straight-line depreciation = $ 8000