Answer:
$100,000,000
Step-by-step explanation:
To calculate relevant break even cost point we ignore all the sunk funds and fixed costs that have already been paid.
This includes,
R&D funds of $1 billion
Tools of $0.5 billion
Factory of $1 million
None of these are the relevant or incremental costs and thus to calculate break even for this order, they will be avoided.
The Break even cost = 50,000 * 2000 = $100,000,000
We only account for the cost of producing each additional unit that is the Marginal Cost of $2,000/missile.
Hope that helps.