Istanbul Sabahattin Zaim University uses the straight-line method of depreciation and its fiscal year end is December 31. The following transactions and events occurred between 2019-2021Prepare the necessary entries. (Show computations.)

2019 July 1 Purchased 100 computers from HP Inc. for $900 cash each plus sales tax of $50, and shipping costs of $10.

2019 Nov. 4 Incurred ordinary repairs on computers of $240 each.

2019 Dec 31 Recorded 2019 depreciation on the basis of a five year life and estimated salvage value of $100 for each computer.

2020 Dec. 31 Recorded 2020 depreciation.

2021 Mar. 1 Paid a total of $8,700 for an upgrade of the computers. This expenditure is

expected to increase the operating efficiency and capacity of the computers.