A large profitable machine shop is planning to purchase special tools for fabricated metal products at $30,000. The tools are estimated to last for 7 years (NOT depreciable life, find depreciable life from table 11-2) and provide a benefit of $6000 per year. The maintenance costs each are $500. The salvage value of the tools is estimated to be $4000 at the end of 7 years. The firm pays 34% income tax. The firm uses MACRS depreciation schedule and plans to benefit most out of the depreciation schedule. Determine if this is a worthwhile investment assuming an MARR of 12%