What is the payback period of the F-22 Raptor project? The Lockheed Martin/Boeing F-22 Raptor is a stealth fighter aircraft. Lockheed Martin invested over $10B on design and manufacturing for the aircraft. Assume that those investments were paid for on Jan 1, 2003. Each aircraft will be sold for $350M and the variable cost of building each airplane is $310M. Assume that 70 aircraft will be sold each year for 5 years. Assume that revenues and costs occur uniformly throughout the year. What is the payback period of the project? 3 years and 7 months 4 years and 5 months 5 years 5 months 3 years