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 1,55 2821 1,820 2022 2,800 2023 4,020 2024 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.) Year Straight-Line Depreciation Book Value at Expense December 31 Double-Declining-Balance Depreciation Book Value at Expense December 31 Units-of-Production Depreciation Book Value at Expense December 31 2020 2021 2022 2023 2024