On January 3, 2020, Xenex Innovations purchased computer equipment for $133,000. The equipment will be used in research and development activities for five years or a total of 10,000 hours and then sold for about $18,000. Assume actual usage in hours of: 2020 1,550 2021 1,820 2022 2023 2024 2,800 4,020 3,100 Required: Calculate depreciation expense and book values for each year of the equipment's life for each method of depreciation using the table provided below. Xenex's year-end is December 31. (Do not round intermediate calculations.) Straight-Line Double-Declining-Balance Units-of-Production Year Depreciation Book Value at Depreciation Book Value at Depreciation Book Value at Expense December 31 Expense December 31 Expense December 31 2020 $ 23,000 $ 110,000 $ 53,200 $ 79,800 2021 $ 23,000 $ 87,000 $ 31,920 $ 101,080 2022 S 23.000 2023 S 23,000 2024 $ $ 23,000 SSS 64,000 $ 40,432 $ 92,568 41,000 $ 37,027 $ 95,973 18,000 $ 38,389 $ 171,389