Klause' Industries is considering Project S whose future expected cash flows are shown below. However, the up-front cost of the project (X) is not given. You are told that the project has a WACC of 10% and that the projects NPV is zero. Based on this information, what is the up-front cost of the project, i.e., what is X?

Year: 0 1 2 3 4

CF_S: X $225 $100 $50 $75

WACC = 10%