please show in excel

A factory is considering purchasing a new machine. It has two alternatives. Machine A costs $15,000 to purchase and 6,000 maintenance cost every year. Machines B costs $30,000 to purchase and its annual maintenance cost is $1,000. Machine A can last 3 years while Machine B has a life of 5 years. If the company chooses one machine, it will have to continue to choose the same machine forever. Which machine should the company choose if the discount rate is 8% ? Please show all your work