I need help understanding the steps to solve the following type of question:

Your firm needs a machine which costs $260,000, and requires $41,000 in maintenance for each year of its 5 year life. After 3 years, this machine will be replaced. The machine falls into the MACRS 5-year class life category. Assume a tax rate of 30% and a discount rate of 15%. What is the depreciation tax shield for this project in year 5?

I am not sure the steps that need to be taken to find the depreciation tax shield using the information given.