Bullette Land Sharks Co. is considering a four-year project whose cost cash flows are given here. The annual operating costs were $6,300 each year. The initial increase in net working capital (NWC) is $1,800. The capital cost in year zero is $20,400; this asset will depreciate straight-line to zero over the four year life of the project and sell for $2,400 at the end of year four. The corporate tax rate is 21% with a required return of 33%. What is the effective annual cost (EAC) for this project?

(just like to know routine and calculations)