Please explain

You are evaluating two different silicon wafer milling machines. The Techron I costs $264,000, has a three-year life, and has pretax operating costs of $71,000 per year. The Techron Il costs $460,000, has a five-year life, and has pretax operating costs of $44,000 per year. For both milling machines, use straight-line depreciation to zero over the project's life and assume a salvage value of $48,000. If your tax rate is 22 percent and your discount rate is 12 percent, compute the EAC for both machines. (A negative answer should be Indicated by a minus sign. Do not round Intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.) Answer is complete but not entirely correct. Techron 1 S 109,622.24 Techron II S 107,570.18