on Jan 1 of the current year a company purchased and placed in serice a machine with a cost of $240,000. The company estimated the machines useful life to be 4 years or 60,000 units of output with an estimated salvage valus of $60,000. During the current year 12,000 united were produced

prepare the necessary Dec 31 adjusting journal entry to record depreciation for the current year assuming the company uses

1) units of production methid deoreciation

2) double declinin balance method of depreciation