3. An investment of $180,000 with a salvage value of $30,000 in 10 years can reduce annual operating cost by $36,000. Use MACRS with depreciation life of 5 years and effective tax of 38% to calculate the present worth of ATCF. MARR = 10% 4. If in problem 3, the investor can claim $5,000 tax credit in the fourth year, redo the calculation just for the fourth year (copy the only row for year 4 from your Table here and make the changes to it). Hint: this should not take more than 5 minutes