A firm is trying to decide whether or not to buy a new machine. The machine will cost $20000 and will be depreciated using the three year MACRS schedule given below. The firm expects to use the machine for 3 years then sell it for $800. They expect sales of $7000 per year, and COGS of $3000 per year. They are in the 40% tax bracket. a. What are the operating cash flows for this project over its three year life