Metlock, Inc. purchased a truck for $70,000. The company expected the truck to last four years or 120,000 miles, with an estimated residual value of $10,000 at the end of that time. During the second year the truck was driven 40,000 miles. Compute the depreciatio for the second year under each of the methods below and place your answers in the blanks provided. Units-of-activity Double-declining-balance