Cost at the fabrication plant: adding cost

You are given the following total costs for a production facility for protective cases for laptop computers: Number of units Produced ('000) O 100 200 300 400 Total Cost ($'000) 600 2,000 3,200 4.200 6.600 The facility (building, land and equipment) could be sold for $4.0 million. The best alternative investment with similar risk returns 12 percen Calculate the price needed to guarantee that the facility doesn't have negative economic profits