Answer: $1,200,000
Step-by-step explanation:
The firm should include $1,200,000 as the cost of the Manufacturing facility for a new project in it's analysis.
This is because $1,200,000 is the opportunity cost of not selling the facility. The old costs that were incurred for the land and the facility are to be considered sunk costs as they have already been incurred and the only relevant cost now is what the market will pay for the facility which is $1,200,000.