You are trying to figure out if you should purchase in cash (additional capex) an upgraded 3D printing system for 200,00 vs lease for 43 K per year over 5 years at which point you will have to return machine. If you buy you will straight line depreciate over 5 yrs. Cost of capital for this all equity company is 6 percent, and the marginal tax rate is 35 %. what is the cheaper cost, show you work. Explain?