Kitchen Supplies, Inc. must replace a machine in its manufacturing plant that will have no salvage value. It has a choice between two models. The first machine will last 5 years and will cost $300,000. It will generate an annual cost savings of $50,000. Annual maintenance costs will be $20,000. The machine will be fully depreciated using the straight-line depreciation method and will have no salvage value. The second machine will last 7 years and will cost $600,000. It will generate an annual cost savings of $70,000. This machine will also be fully depreciated using the straight-line depreciation method, but is expected to have a salvage value of $60,000 at the end of the seventh year. The annual maintenance cost is $15,000. Revenues in each case are expected to be the same. The annual tax rate is 35% and the cost of capital is 10%. Which machine should the company purchase?