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 Cost Yearly Net Savings $50 000 60 000 75 000 Economic Life Salvage Value Model $100 000 150 000 200 000 5 years 5 years 3 years $20 000 30 000 100 000 RCMP's after-tax 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? Show all calculations