18 2 pts SixthZ prepared the following contribution margin income statement based on a sales volume of 800 treehouses: Sales $250,000 Less: Variable Expenses $120,000 Contribution Margin $130,000 Less: Fixed Expenses $60,000 Net Operating Income $70,000 Calculate the margin of safety. O $180,000 O $248,900 O $134,615 $130,000