There is an old saying. Sometimes, the best deal is the one that you don't do. I have heard Phil Condit say that it makes no sense to sell airplanes, unless Boeing can make a reasonable amount of profit.
Harry Stonecipher likes to quote his old boss at GE
, Jack Welch. Words to the effect, it's not just the number of units sold, but it's the profit margin on each unit. Sometimes, it's better to sell less at greater margin than a lot at virtually no margin.
If Spirit wants the kind of discount that Airbus is offering, I don't blame Boeing for telling Spirit to take a hike. Airbus is more interested in getting planes delivered, rather than it's profits. Since Boeing must answer to individual and institutional investors, rather than goverments, it has to worry about earnings per share and stock performance.
Boeing tried to see how many planes it could deliver and got into problems. It has to focus on getting the most profit out of each aircraft sold, even if it means less market share.