Need help on the red parts

Your answer is partially correct. Try again. Here are selected 2017 transactions of Sheffield Corporation. Jan. 1 June 30 Dec. 31 Retired a piece of machinery that was purchased on January 1, 2007. The machine cost $62,000 and had a useful life of 10 years with no salvage value. Sold a computer that was purchased on January 1, 2015. The computer cost $35,200 and had a useful life of 4 years with no salvage value. The computer was sold for $5,900 cash. Sold a delivery truck for $9,210 cash. The truck cost $23,000 when it was purchased on January 1, 2014, and was depreciated based on a 5-year useful life with a $4,000 salvage value. Prepare a tabular summary to record all transactions described on the above dates. Update depreciation on assets disposed of, where applicable. Sheffield Corporation uses straight-line depreciation. (If a transaction causes a decrease in Assets, Liabilities or Stockholders' Equity, place a negative sign (or parentheses) in front of the amount entered for the particular Asset, Liability or Equity item that was reduced.) Assets = Liabilities + Stockholders' Equity Retained Earnings Revenue - Expense - Cash + Equipment - Accum. Depr.- Equip. = + Common Stock + Dividend Jan. 1 T -62,000 -62,000 June 30 1 4,400 4.400 Depreciation expense T 5,900 T -35,200 -22,000 7,300 Loss on disposal Dec. 31 T | 3,800 3,800 I Depreciation expense 9,210 =X -23,000 -15,200 1,400 Gain on disposal