Marin Word Processing Service uses the straight-line method of depreciation. The company's fiscal year end is December 31. The following transactions and events occurred during the first three years. 2020 July 1 Nov. 3 Dec. 31 Purchased a computer from the Computer Center for $1,800 cash plus sales tax of $120, and shipping costs of $80. incurred ordinary repairs on computer of $150. Recorded 2020 depreciation on the basis of a four-year life and estimated salvage value of $600. Recorded 2021 depreciation. Paid $450 for an upgrade of the computer. This expenditure is expected to increase the operating efficiency and capacity of the computer. 2021 Dec. 31 2022 Jan 1 Prepare the necessary entries. (Credit account titles are automatically indented when the amount is entered. Do not indent manually. Record journal entries in the order presented in the problem. List all debit entries before credit entries. If no entry is required, select "No Entry" for the account titles and enter o for the amounts.) Debit Credit Date Account Titles and Explanation July 1 2020 Date Account Titles and Explanation Debit Credit July 1, 2020 llll