Final answer:
The accumulated depreciation for the equipment after adjusting entries were made on December 31, 2020 will be $180,000.
Step-by-step explanation:
In this case, since the equipment was purchased on October 15, 2017, and her company has a December 31 year-end, no depreciation will be recorded for that particular year. However, for the subsequent years, the straight-line depreciation method will be used. This means that the $300,000 cost will be spread evenly over the 5-year useful life of the equipment. The accumulated depreciation is simply the total depreciation recorded over the years.
To calculate the annual depreciation, we divide the cost ($300,000) by the useful life (5 years), resulting in $60,000 of depreciation per year. Since the equipment was purchased on October 15, 2017, it will have been used for 3 years by December 31, 2020. Therefore, the accumulated depreciation will be $60,000 x 3 = $180,000.