Machinery purchased for $64,200 by Sheridan Co. in 2016 was originally estimated to have a life of 8 years with a salvage value of $4,280 at the end of that time. Depreciation has been entered for 5 years on this basis. In 2021, it is determined that the total estimated life should be 10 years with a salvage value of $4,815 at the end of that time. Assume straight-line depreciation. Required:
a. Prepare the entry to correct the prior year's depreciation, if necessary
b. Prepare the entry to record depreciation for 2015

Sheridan Co.

a. It is not necessary to correct the prior year's depreciation.  Depreciation is an accounting estimate and does not require the adjustment of prior year's accounts when there is a correction in its estimates.

b. Entry to record depreciation for 2021:

Debit Depreciation Expense $4,387

Credit Accumulated Depreciation $4,387

To record the depreciation expense for the year.

Explanation:

a) Data and Calculations:

Purchase of machinery in 2016 = $64,200

Original estimated useful life = 8 years

Salvage value = $4,280

Depreciation amount = $59,920 ($64,200 - $4,280)

Depreciation expense per year = $7,490 ($59,920/8)

Accumulated depreciation for 5 years = $37,450

Net book value = $26,750 ($64,200 - $37,450)

Remaining estimated useful life = 5 years

Salvage value = $4,815

New depreciable amount = $21,935 ($26,750 - $4,815)

Depreciation expense per year = $4,387 ($21,935/5)