Its development took 10 years and cost $7 billion.
The development of the Churchill Museum cost a further £6 million.
This development would cost in the region of £100 million.
The development of the dual-mode version cost an additional £10m.
Lockheed estimated that development and initial production would cost $5.912 billion over a period from 1970 to 1975.
Many analysts say development and production will cost nearly $40 billion.
By the time it was released in 1977, the development had cost about US$100 million.
Exxon said the development would cost more than $2 billion.
The development of the B-2 "took longer and cost more than we thought it would," the general said.
This development has cost $40 million and further development is planned.