7. Depreciation Expense The Sprague Company purchased a fabricating machine on July 1 2018, at a net cost of $130,000. At the end of its four-year life, the company estimates that the machine will be worth $30,000. Sprague also estimates that the machine will run for 25,000 hours during its four-year life. The company's fiscal year ends on December 31. a Compute depreciation expense for 2018 and 2019 using the Straipht-Line method b Compute depreciation expense for 2018 and 2019 using the Sum-of the-Years digits method c. Compute depreciation expense for 2018 and 2019 using the Double Declinig Balance method