An equipment manufacturer has a machine that has a useful life of

making $150,000$ widgets. The estimated annual production is as follows$$

Year $1=30,000$ units

Year $2=25,000$ units

Year $3=20,000$ units

Year $4$ through year $8=15,000$ units $/$ year

The machine cost $$150,000$ new. Determine the $$units of production$$

depreciation schedule for each year, assuming that salvage value $=$ $$0$