Ridgely Custom Metal Products (RCMP) must purchase a new tube bender. They consider three models with costs and benefits as per the following table: First Economic Yearly Net Salvage Model Cost Life Savings Value T $100 000 5 years $50 000 $20 000 A 150 000 5 years 60 000 30 000 X 200 000 3 years 75 000 100 000 RCMP's aftertax MARR is 11 percent and the corporate tax rate is 52 percent. A tube bender is a CCA Class 8 asset with a depreciation rate of 20%. Using the present worth method and the least-cost multiple of the service lives, which tube bender should it buy