In an effort to capture the large jet market, Airbus invested $13 billion developing its A380, which is capable of carrying 800 passengers. The plane had a list price of $280 million. In discussing the plane, Airbus stated that the company would break even when 249 A380s were sold. a. Assuming the break-even sales figure given is the accounting break-even, what is the cash flow per plane? (Enter your answer in dollars, not millions of dollars, and round your answer to the nearest whole number, e.g., 1,234,567.) b. Airbus promised its shareholders a 20 percent rate of return on the investment. If sales of the plane continue in perpetuity, how many planes must the company sell per year to deliver on this promise? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) c. Suppose instead that the sales of the A380 last for only 10 years. How many planes must Airbus sell per year to deliver the same rate of return? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)