Hey Gil,

13 planes with 2700 seats, of which 198 are business class, balance economy, if I did my math right...

It seems logical to assume the order was for 198 to 500 units.

Just a wild guess on my part.

2700 - 198 = 2502

2502/13 = 192

or approx 15 per plane for rentals, assuming biz class are free, which is very conservative.

I'm just guessing here, but 500 may not cut it.