Cullumber's Repair 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.

$2021$ July $1$ Purchased equipment from the Equipment Center for $$8,000$ cash plus sales tax of $$550,$ and shipping costs of $$360.$

Nov. $3$ Incurred ordinary repairs on computer of $$340.$

Dec. $31$ Recorded $2021$ depreciation on the basis of a four$-$year life and estimated salvage value of $$470.$

$2022$ Dec. $31$ Recorded $2022$ depreciation.

$2023$ Jan. $1$ Paid $$2,100$ for a major upgrade of the equipment. This expenditure is expected to increase the operating efficiency and capacity of the equipment.