The Harnett County Healthcare System wants to purchase an equipment for a healthcare procedure. Two models are considered, Model A or Model B. Model A has a fixed cost of $75,000 and variable cost of $150 per use, while Model B has a fixed cost of 590.000 and variable cost of $10 per use. The Healthcare System charges $400 per use of this equipment At whevel of demand (#tuses) is the Healthcare System indifferent between the two models