I don't understand how this process works. Could someone in depth explain how you get the numbers listed?

Suppose ShipNow purchased equipment on January 1, 2018, for $62,000. The expected useful life of the equipment is 10 years or 150,000 units of production, and its residual value is $2,000. ShipNow prepared the following analysis of two depreciation methods: (Click the icon to view the analysis.) Read the requirements Requirement 1. Suppose the income tax authorities permitted a choice between these two depreciation methods. Which method would ShipNow select for income tax purposes? Why? For tax purposes, ShipNow would select the double-declining-balance method because it results in the most depreciation in the earliest years of the asset's life. This method minimizes income tax payments in the early years of the asset's life and maximizes the business's cash at the earliest possible time. 3,968 Requirement 2. Suppose ShipNow purchased the equipment described in the table on January 1, 2018, and depreciated the equipment by using the double-declining balance method. On July 1, 2020, ShipNow sold the equipment for $36,000 cash. Record depreciation for 2020 and the sale of the equipment on July 1, 2020 (Record debits first, then credits. Select the explanation on the last line of the journal entry table.) First, record depreciation to the date of sale. Journal Entry Data Table - X Date Accounts and Explanations Debit Credit July 1, 2020 Depreciation Expense-Equipment 3,968 Accumulated Depreciation Equipment Method A: Straight-Line Method B: Double-Declining-Balance Annual Annual Depreciation Accumulated Depreciation Accumulated To update depreciation. Year Expense Depreciation Book Value Expense Depreciation Book Value Now record the sale of the equipment. Start $ 62,000 $ 62,000 Journal Entry 2018$ 6.000 $ 6,000 56,000 $ 12,400 $ 12,400 49,600 Date Accounts and Explanations Debit Credit 2019 6,000 12.000 50,000 9.920 22,320 39,680 July 1, 2020 Cash 36,000 2020 6,000 18,000 44,000 7.936 30,256 31,744 Accumulated Depreciation-Equipment Equipment 62,000 Done Gain on Sale of Equipment 288 To record sale of equipment. 26.288 Print