Global, I believe the original plan was for 220 aircraft.....
The Douglas C-X proposal in 1981 was for a 210 aircraft buy. FSED (Full Scale Engineering Development) contract award was in 1982 and C-X was designated C-17 at that time. Planning was still for 210 aircraft. Although Douglas won the competition and was granted FSED authorization, no funding was authorized till 1985. Douglas floated the program on internal funds during that period. It nearly wiped them out and robbed them of funds for commercial aircraft development. The T-45 Goshawk (carrier capable BAE Hawk Mk. 60) was also in development in Long Beach at that time and while it was well funded, it absorbed a lot of engineering and other limited resources.