You are evaluating a potential purchase of several light-duty trucks. The initial cost of the trucks will be $143,000. The trucks fall in the MACRS 5-year class that allows depreciation of 20% the first year, 32% the second year, 19% the third year, 12% the fourth year, 11% the fifth year, and 6% the sixth year. You expect to sell the trucks for 20,000 at the end of five years. The expected revenue associated with the trucks is $105,000 per year with annual operating costs of $57,000. The firm's marginal tax rate is 30.0%. What is the after-tax operating cash flow for year 4?