Machinery A B D $48,760 2015 $84,800 2017 $84,800 2019 10 years Original cost Year purchased Useful life Salvage value Depreciation method Accum. depr through 2020* $54,060 2016 15,000 hours $3,180 Activity $37,312 $3,286 Sum-of-the-years-digits $33,072 15 years 10 years $5,300 $5,300 Straight-line Double-declining balance $15,900 $16,960 *In the year an asset is purchased, Skysong, Inc. does not record any depreciation expense on the asset. In the year an asset is retired or traded in, Skysong, Inc. takes a full year's depreciation on the asset. The following transactions occurred during 2021. (a) On May 5, Machine A was sold for $13,780 cash. The company's bookkeeper recorded this retirement in the following manner in the cash receipts journal. Cash 13,780 Machinery (Machine A) 13,780 (b) On December 31, it was determined that Machine B had been used 2,000 hours during 2021. (c) On December 31, before computing depreciation expense on Machine C, the management of Skysong, Inc. decided the useful life remaining from January 1, 2021, was 10 years. (d) On December 31, it was discovered that a machine purchased in 2020 had been expensed completely in that year. This machine cost $29,680 and has a useful life of 10 years and no salvage value. Management has decided to use the double- declining-balance method for this machine, which can be referred to as "Machine E." Prepare the necessary correcting entries for the year 2021. Record the appropriate depreciation expense on the above- mentioned machines. (If no entry is required, select "No entry" for the account titles and enter for the amounts. Round intermediate calculations to 3 decimal places, e.g. 4.589 and final answers to 0 decimal places, e.g. 45,892. Credit account titles are automatically indented when amount is entered. Do not indent manually.) No. Account Titles and Explanation Debit Credit (a) (To record current depreciation) (To properly record the sale) (b) (c) (d) (To correct the incorrect expensing of the asset in 2020) (To record depreciation)