Countrywide Travel Contribution Margin Income Statement Three months ended March 31, 2011 Sales revenue: $316,500 Variable costs: 127,000 Contribution margin: 189,500 Fixed cost: 174,000 Operating income: 15,500 Relevant range: between sales of 251,000 and 365,000 Prepare 2 contribution margin income statements: one at the 251,000 level and one at the 365,000 level