Panther Corporation has provided the following contribution format income statement. All questions concern situations that are within the relevant range. Sales (2,000 units) $120,000 Variable expenses 72,000 Contribution margin 48,000 Fixed expenses 33,000 Net operating income $15,000 Required: If sales decline to 1,500 units, what would be the estimated net operating income? Only include the Net Operating Income number in your response