Northern Travel uses the contribution margin income statement internally. Northern's first quarter results are as follows: BE: (Click the icon to view the income statement.) Northern's relevant range is sales of between $135,000 and $675,000. Read the equirements Requirement 1. Prepare contribution margin income statements at sales levels of $240,000 and $460,000. (Hint: Use the contribution margin ratio.) Begin by preparing the contribution margin income statement at the $240,000 level. (Round the variable expense rate to the nearest whole percent. Enter losses with a minus sign or parentheses.) Northern Travel Contribution Margin Income Statement Three Months Ended March 31 Sales revenue Less: Variable expenses Contribution margin Less: Fixed expenses Operating income (loss) Requirements 1. Prepare contribution margin income statements at sales levels of $240,000 and $460,000. (Hint: Use the contribution margin ratio.) 2. Compute breakeven sales in dollars