(The following information applies to the questions displayed below.) Ohio Limestone Company produces thin limestone sheets used for cosmetic facing on buildings. The following income statement represents the operating results for the year just ended. The company had sales of 1,800 tons during the year. The manufacturing capacity of the firm's facilities is 3,000 tons per year. (Ignore income taxes.) OHIO LIMESTONE COMPANY Income Statement For the Year Ended December 31, 20x1 Sales $900,000 Variable costs: Manufacturing $315,000 Selling costs 180,000 Total variable costs $495,000 Contribution margin $ 405,000 Fixed costs: Manufacturing $100,000 Selling 107,500 Administrative 40,000 Total fixed costs $247,500 Net income $157,500 Required: 1. Calculate the company's break-even volume in tons for 20x1. Break-even volume E tons