Bonus ! Please help

On January 1, 2013, Hedgehog Company purchased new equipment for $440,000. The equipment had an estimated $40,000 salvage value at the end of its estimated ten-year useful life. Straight-line depreciation has been recorded. Before adjusting the accounts for 2019. Hedgehog extends the useful life of the equipment by four years and decreases the salvage value to $20,000. Required: Calculate the 2019 depreciation expense. What is the equipment's book value at the end of 2019 after recording the 2019 depreciation expense? Selected balance sheet and income statement information for the office supply retailer, Binders and More Co., for 2016 through 2014 follows: Compute the current ratio for each year Compute times-interest-earned ratio for each year